Abstract:
A portable hand-held apparatus includes a semiconductor memory, a reproduction block, a display, a control block, a housing, and an operation block configured to supply a signal to the control block depending on user manual inputs. The operation block includes a circuit at a surface of the housing configured to detect a first user manual gesture in a first direction approximately parallel to the housing surface, a second user manual gesture in a direction opposite to the first direction and also approximately parallel to the housing surface, and a third user manual gesture in a direction that is perpendicular to the housing surface. The first and second gestures are used to select a particular one of the one or more pieces of sound data, and reproduction of a particular piece of sound data occurs in response to the third gesture.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of and claims the benefit of priority under 35 U.S.C. §120 from U.S. Ser. No. 12/651,028, filed Dec. 31, 2009, which is a Continuation of application Ser. No. 11/742,641, filed on May 1, 2007, now U.S. Pat. No. 7,725,652, which is a continuation of application Ser. No. 10/870,195, filed on Jun. 17, 2004, now U.S. Pat. No. 7,313,647, which is a division of application Ser. No. 10/043,506, filed on Jan. 10, 2002, now U.S. Pat. No. 6,775,753, which is a division of application Ser. No. 09/703,885, filed on Nov. 1, 2000, now U.S. Pat. No. 6,339,814, which is a division of application Ser. No. 09/128,744, filed on Aug. 4, 1998, now U.S. Pat. No. 6,490,235, which claims the benefit of priority under 35 U.S.C. §119 from Japanese Patent Application Nos. 09-215209, filed Aug. 8, 1997 and 09-213656, filed Aug. 7, 1997. The entire contents of each of the above applications are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a storage and reproduction apparatus, and in particular to a storage and reproduction apparatus using a semiconductor memory. 
     2. Description of the Prior Art 
     Nowadays, there are recording/reproduction apparatus which can easily be used for recording/reproducing a sound just like writing down contents of a lecture or discussion on a memo paper. Such a recording/reproduction apparatus uses a semiconductor memory as a recording medium for storing a sound signals as a predetermined number of files and the sound signal is reproduced to output a sound. More specifically, the recording/reproduction apparatus stores a sound data consisting of a plurality of files in a semiconductor memory and upon reproduction, successively reproduces the sound data, starting with an older file. 
     When writing down contents of a discussion on a memo notebook, the latest content is written on a later page of the memo notebook. Accordingly, when reading the contents afterward, it is necessary to turn pages to read the latest contents. 
     This inconvenience is also met in a recording/reproduction apparatus in a semiconductor apparatus which stores a latest sound as a last file in a semiconductor memory, which requires search of the file containing the latest sound prior to reproducing the latest sound. 
     Those files stored in memory can be erased when they have become unnecessary. However, when there is a necessity to reproduce a file or when new files are successively stored without any time to erase them, more important files tend to be recorded at the last write-in address or read-out address of memory. Accordingly, as more and more files are recorded, there will be contained more files which are scarcely to be assessed. Those files which are not so important are first to be read out from memory to be reproduced and the latest file which has been just recorded tends to be the last to be reproduced. 
     That is, when a user wants to reproduce a sound data of the latest important file, he/she needs to carry out an operation for search the target latest file from a plurality of files stored in memory. This requires a complicated operation procedures to read out a necessary file from memory and reproduce it. 
     In order to read out from memory and reproduce a target sound data in the aforementioned recording/reproduction apparatus using a semiconductor memory, a user needs to operate a plurality of operation buttons such as a reproduction button, forward direction search button, and reverse direction search button. More specifically, when a plurality of data pieces are recorded in a semiconductor memory, prior to reproduction, it is necessary to press a forward direction search button and a reverse direction search button to select a target data piece to be reproduced so that an index number of the target data piece is displayed in a display block of the apparatus. After this, a reproduction button is pressed so as to reproduce the target sound data. Here, if a plenty of index numbers are involved, the user needs to continuously press the search button so as to display the target index number. 
     SUMMARY OF THE INVENTION 
     It is therefore an object of the present invention to provide a storage and reproducing apparatus which resolves the above-mentioned problem. 
     One aspect of the present invention is directed to a portable hand-held apparatus that includes a semiconductor memory configured to store one or more pieces of sound data and a reproduction block including a loudspeaker configured to reproduce one or more of the pieces of sound data as sound signals from the loudspeaker. This apparatus also includes a display panel configured to display selectable information corresponding to each of one or more of the pieces of sound data, a control block that includes a microcomputer and a program that is executable by the microcomputer to control the apparatus, and a housing configured for hand-held operation containing the reproduction block, the display panel and the control block. This apparatus also includes an operation block configured to supply a signal to the control block depending on user manual inputs to the operation block. The operation block includes a circuit at a surface of the housing configured to detect a first user manual gesture in a first direction approximately parallel to the housing surface, a second user manual gesture in a direction opposite to the first direction and also approximately parallel to the housing surface and a third user manual gesture in a direction that is perpendicular to the housing surface. The circuit of the operation block is configured to detect the first user manual gesture and the second user manual gesture in selecting a particular one of the one or more pieces of sound data when the display panel displays the selectable information corresponding to the particular one of the one or more of the pieces of sound data. The reproduction block is configured to reproduce the particular one of the one or more pieces of sound data in response to the circuit of the operation block detecting the third user manual gesture. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram showing a specific configuration of an IC recorder according to the present invention. 
         FIG. 2  is an external front view of the IC recorder. 
         FIG. 3  shows a configuration of a semiconductor memory of the IC recorder. 
         FIG. 4  shows a configuration of an eternal block of the semiconductor memory. 
         FIG. 5  shows a configuration of an index stage block constituted by a file data of the semiconductor memory. 
         FIG. 6  shows a configuration of an ADR data block of the index stage block. 
         FIG. 7  shows a configuration of an HDR data block of the index stage block. 
         FIG. 8  shows a configuration of an index stage block constituted by a file data of the semiconductor memory. 
         FIG. 9  shows a configuration of a work area block of the semiconductor memory. 
         FIG. 10  shows a configuration of a PCM data block of the semiconductor memory. 
         FIG. 11  explains a recording position of a new sound data stored. 
         FIG. 12  is a flowchart explaining a CPU operation when additionally recording a new sound data as of ID number 02. 
         FIG. 13  shows a configuration of an ADR data of the index stage block when a new sound data is additionally recorded as of ID number 02. 
         FIG. 14  explains a storage position of a new sound data additionally recorded as of ID number 02. 
         FIG. 15A  and  FIG. 15B  explain a configuration of a jog dial:  FIG. 15A  is an external front view of the jog dial and 
         FIG. 15B  is an external rear view of the jog dial. 
         FIG. 16  shows rotation directions of a rotation operation member in connection with signals outputted as a result of a jog dial rotation operation together with corresponding output waveforms. 
         FIG. 17  explains an operation of a rotary operation member associated with a cue/review reproduction and a reproduction state transition corresponding to the operation of the rotary operation member. 
         FIG. 18  a processing carried out when the rotary operation member is rotated or pressed in a stop state. 
         FIG. 19  shows a processing carried out when the rotary operation members rotated or pressed in a sound data reproduction state. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Hereinafter, description will be directed to a storage and reproducing apparatus according to embodiments of the present invention with reference to the attached drawings. In the embodiments described below, explanation will be given on a recording/reproduction apparatus (hereinafter, referred to simply as an IC recorder) using a semiconductor memory for recording or reproducing a sound signal. 
     Referring to  FIG. 1 , this IC recorder  1  includes: a recording block  10  for converting an analog sound signal from a microphone  11 , into a digital sound data and storing the digital sound data in a semiconductor memory  9 ; a reproduction block  20  for reading out the sound data stored in the semiconductor memory  9  and converting the read out sound data into an analog sound signal for reproduction output from a speaker  24 ; a control block  30  for controlling apparatus components including the recording block  10 ; a display block  40  for displaying an operation state and an operation procedure; and an operation block  50  through which a user enters various operations. 
     The recording block  10  has: an amplifier  12  for amplifying a an analog sound signal outputted from the microphone  11 ; an automatic gain controller (hereinafter, referred to as AGC) circuit for adjusting a level of the sound signal amplified by the amplifier  12 ; an encoder  14  for converting the sound signal from the AGC  13 , into a sound data; and a buffer memory  15  for temporarily accumulating the sound data from the encoder  14 . 
     In the recording block  10 , the microphone  11  converts a speaker&#39;s voice into an analog signal for supply to the amplifier  12 . The amplifier  12  amplifies the analog sound signal for supply to the AGC  13 . The AGC  13  amplifies the signal from the amplifier  12  so that the analog sound signal is at a proper level for supply to the encoder  14 . 
     Because the analog sound signal supplied via the AGC  13  has a strong temporal correlation, the encoder  14  employs, for example, the adaptive differential pulse code modulation (hereinafter, referred to ADPCM) to encode an analog sound signal with a small data amount, to create a digital sound data and supplies the created sound data to the buffer memory  15 . The encoder  14  can adjust a sound data coding amount according to two modes. For example, in an SP mode, a sound signal is sampled with an 8 kHz sampling frequency if in an SP mode and with a 4 kHz sampling frequency if in an LP mode so as to adjust a sound signal coding amount in the temporal axis direction. 
     The buffer memory  15  temporarily accumulates a sound data supplied from the encoder and supplies the accumulated data to the semiconductor memory  9 . 
     The semiconductor memory  19  is constituted, for example, by an electrical erasable/programmable read only memory (hereinafter, referred to as an EEPROM), i.e., an non-volatile semiconductor memory which maintains a storage content of a storage element even if a memory drive power is turned off. This semiconductor memory  9  stores a sound data supplied from the buffer memory  15  and a management information (hereinafter, referred to as a TOC information) for carrying out a management, for example, which sound data is stored in which area. More specifically, the semiconductor memory  9  is, for example, a NAND type flash memory having a storage capacity of 4M×8 bits or 8×16 M bits, enabling to store a sound data corresponding to a sound signal of a predetermined frequency band for 30 minutes. For example, when the memory  9  has a storage capacity of 8×16 M bits, it is possible to store a sound data corresponding to a sound signal of 200 to 3400 Hz for 16 minutes in the aforementioned SP mode and to store a sound data corresponding to a sound signal of 200 to 1700 Hz for 24 minutes in the aforementioned LP mode. 
     On the other hand, the reproduction block  20 , as shown in  FIG. 1 , has a decoder  21  for converting a sound signal read from the semiconductor memory  9 , into a sound signal, a filter  22 , and an amplifier  23  for amplifying the sound data from the filter  22  for supply to a loud speaker  24 . 
     The decoder  21  corresponds to the encoder  14  of the recording block  10 , and decodes a sound data which has been encoded by the ADPCM method, so as to create a so-called PAM signal. The filter  22  removes a high frequency component exceeding a voice frequency band from the PAM signal and outputs an analog sound signal. The amplifier  23  amplifies the analog sound signal supplied from the filter  22 . The loud speaker  24  is driven according to a signal from the amplifier  23 . Thus, a sound recorded in the memory  9  is outputted from the loud speaker  24 . 
     The control block  30  includes: a ROM  31  containing a program for controlling the IC recorder; a microcomputer (hereinafter, referred to as a CPU)  32  for executing the program stored in the ROM  31  to control respective blocks; a random access memory (hereinafter, referred to as a RAM)  34  for temporarily storing the time of a timer  33  for creating a clock information, a program execution result, and the like; and a counter  35  for counting pulses supplied from a jog dial which will be detailed later. The control block  30 , according to an operation setting of the operation block  50 , carries out operation control of respective components of the apparatus  1 . 
     The display block  40  displays an operation state of the IC recorder  1  and a sound data storage state according to a control signal from the control block  30  and includes a liquid crystal display panel  41  and a back light  42  for illuminating this liquid crystal display panel  41 . 
     The operation block  50  supplies various input signals to the control block  30  when carrying out a sound recording/reproduction. The operation block  50  has various operation buttons, operation switches, and a jog dial to be operated by a user as will be detailed later. In the IC recorder  1 , various output signals from these operation buttons/switches ad the jog dial are supplied to the control block  30 . 
     The CPU  32  of the control block  30 , according to a signal supplied from the operation block  50 , reads out from the ROM and executes a corresponding program and controls the respective blocks according to the program which has been read out. For example, if a recording start button which will be detailed later is pressed, the CPU  32  reads out from the ROM and executes a program corresponding to a recording operation and controls to operate the amplifier  12 , the AGC  13 , the encoder  14 , the display block  40 , and the like according to the program which has been read out, so that a sound data temporarily accumulated in the buffer memory  15  is written in an empty area of the semiconductor memory, for example. For reproduction of a sound data, the CPU  32  reads out from the ROM and executes a program corresponding to a reproduction operation and according to the program which has been read out, control to operate the decoder  21 , the filter  22 , the amplifier  23 , the display block  40 , and the like, so that a sound data stored in a predetermined area of the semiconductor memory  9  is read out and converted into an analog sound signal so as to be outputted from the loud speaker  24 . 
     Thus, the control block  30  controls a sound data writing and reading out into/from the semiconductor memory  9  and write up to 99 sound data pieces, for example, into the semiconductor memory  9  by adding an index number to identify each of the sound data pieces. According to the index number added to each of the sound data pieces, the control block  30  controls to read out a target sound data piece from the semiconductor memory  9 . 
     Next, explanation will be given on the operation block  50  of the IC recorder  1  with reference to  FIGS. 1 and 2 .  FIG. 2  is an external view briefly showing an external configuration of the IC recorder  1 . The IC recorder shown in  FIG. 2  is a portable type has an external casing  2  of a size to be grasped by one hand. In this external casing  2  is arranged a printed circuit board (not depicted) where the aforementioned electric circuits such as recording block  10  and the reproduction block  20  are mounted. On a main surface  2   a  of this external casing  2  are arranged the aforementioned liquid crystal display panel  41  an the loud speaker  24 . 
     This IC recorder  1  has on the main surface  2   a  and side surfaces of the external casing  2 , various operation buttons/switches  51  to  57  constituting the operation block  50  and the jog dial  60 . The buttons and switches of the operation block  50  are arranged on the main surface  2   a  and the side surfaces of the casing  2  and can be operated with left hand fingers while the entire IC recorder  1  is held on the left hand palm so that a the user can continue a work such as writing with his/her right hand. 
     The operation buttons involved here are, as shown in  FIG. 2 , FILE button  51 , MENU button  52 , PRIORITY button  53 , STOP button  54  for stopping a recording or the like, REC button  55  for starting a recording, and ERASE button for erasing a sound data stored in the semiconductor memory  9 . These operation buttons are arranged on the main surface  2   a  for the external casing  2 . A HOLD switch  57  of slide type is provided at a lower half of a left side surface  2   b  of the external casing  2 . The operation bloc  50  also includes, although not depicted, a button for turning on the back light  42  of the liquid crystal display panel  41 , a volume switch for adjusting loudness of a reproduced sound, an earphone jack, and the like which are arranged on a side surface of the external casing  2 . 
     Here, the FILE button  51  is used to switch between a plurality of files set in the IC recorder  1 . The term file corresponds to a directory or folder used in a personal computer. In this embodiment, five types of files are set beforehand. That is, in this IC recorder  1 , each of the files can store up to 99 sound data pieces. The file types can be identified by displaying different icons on the liquid crystal display panel  41 . 
     The MENU button  52  is used to operate during a stop state of recording/reproduction so as to modify the initial setting of the IC recorder  1  such as modification of a data and time, modification of a frequency band of a sound data to be recorded, modification of output of a beep sound and alarm sound given upon pressing of the operation buttons, modification of sensitivity of the microphone, and the like. 
     The PRIORITY button  53  is pressed during a reproduction operation or a stop state of the apparatus  1  so as to determine the reproduction priority for a sound stored in the memory  9 . When this PRIORITY button  53  is pressed, an index number of a target sound data such as a data which is being reproduced is modified to a smaller number. In that file, a sound data having an index number modified by the PRIORITY button  53  is reproduced with a higher priority. 
     The HOLD switch  57  is used to maintain an operation state or a stop state of the IC recorder  1 . When this HOLD switch is in ON state, the IC recorder  1  is in a state not to accept operation of the operation buttons  51  to  56  and the jog dial  60 . The configuration of the jog dial  60  and a reproduction operation using the jog dial  60  will be detailed later. 
     Here, as shown in  FIG. 3 , when a sound data and other data are stored in the semiconductor memory  9 , the data is divided into 512 blocks which are erase units. These blocks are grouped into six types as follows: an eternal block (1 block), index stage 0 blocks (6 blocks), index stage 1 blocks (6 blocks), a back-up block (1 block), work area blocks (15 blocks), and PCM data blocks (469 blocks). 
     The aforementioned TOC information consists of the eternal block, index stage 0 block, index stage 1 block back-up block, and work area block. A sound data is written into PCM data blocks. 
     As shown in  FIG. 3 , each of the blocks consists of 16 pages (each page consisting of 528 bytes): page 0, page 1, . . . , page 14, page 15. Each one page consists of a 512-byte data area and a 16-byte redundant area. Ten blocks at maximum exist as blocks disabled for data recording and/or reproduction (hereinafter, referred to as invalid blocks). 
     The eternal block is provided other than at the first and the last blocks of the memory  9 , i.e., other than at the memory write-in or read-out start and end addresses. The eternal block contains a management information which is first to be read out from the memory  9 . According to the data of the eternal block, the index stage 0 blocks and the index stage 1 blocks are read out. Thus, the eternal block is indispensable for reading out a data stored in the other blocks and accordingly located at a position other than the head and end addresses of the memory  9  which have the highest possibility of destruction upon an abnormal operation such as static electricity and an abnormal voltage. For example, if a block containing a sound data is destroyed, the data in the broken block can be erased so that a new sound data can be recorded without any problem. However, if the eternal block is destroyed, no data can be read out from the other blocks. To avoid such a situation, the eternal block is located, as has been described above, at other than the blocks of the memory  9  start and end addresses. 
     In the eternal block, only page 0 contains a data, and pages 1 to 15 contain no data. More specifically, as shown in  FIG. 4 , page 0 of the eternal block includes a 4-byte eternal block recognition data, 2-byte eternal block address, 3-byte index stage 0 address, 2-byte index stage 1 address, 2-byte work area block start address, 4-byte dummy data, and 128-byte blank map. The blank map indicates locations of the aforementioned invalid blocks. 
     The index stage 0 blocks and the index stage 1 blocks have an identical data configuration and these blocks are alternately rewritten for each sound data rewriting. That is, when a sound data is written in the memory  9 , for example, a data in an index stage 0 block is rewritten, and when another sound data is written in the memory  9 , a data in an index stage block is rewritten. Hereinafter, these blocks will be referred to as index stage blocks in general. 
     As has been described, there are 6 index stage blocks for stage 0 and stage 1, respectively: five blocs containing a file data and one block containing a stage data. 
       FIG. 5  shows a configuration of an index stage block having a file data which consists of an ADR data block of page 0 to page 11 and an HDR block of page 12 to page 15. 
       FIG. 6  shows a configuration of the ADR data block, which has, for example, ID numbers 01 to 06; SP which indicates the recording mode SP or LP corresponding to a coding amount by the aforementioned encoder  14  for each of the files containing a sound data; STH indicating an upper start address and STM indicating a lower start address of the file; ENH indicating an upper end address and ENM indicating a lower end address of the file. 
     For example, when 6 sound data pieces are recorded, as shown in  FIG. 7 , in the ADR data block, index numbers 01 to 06 are recorded corresponding to the six sound data pieces. This index number is a data indicating a reproduction sequence of the six sound data pieces recorded. For each of the index numbers, recording mode (SP) together with a start address (STH, STM) and an end address (ENH, ENM) of the area containing the sound data are recorded. Because the sound of the index number 01 and the sound data of the index number 03 have a large capacity, as shown in  FIG. 6 , the index number 01 consists of two files and the index number 03 consists of four files, for example. In this case, for each of the files, a recording mode and a start address and an end address are recorded. 
       FIG. 7  shows a configuration of the HDR block. The following are recorded for each file; PRI indicating a file priority set by operation of the PRIORITY button  53  of the operation block  50 ; ALM indicating ON/OFF of the alarm setting by the operation of the MENU button  52 ; AMO, ADA, AHO, AMI, and AOW indicating the month, day, hour, minute, day of the week when the alarm is to be actuated. Here, as has been described above, the priority indicates a reproduction priority of a sound data when the sound data is reproduced. The HDR data block is updated when the priority or alarm setting is modified by operation of the PRIORITY button  53  and the MENU button  52  even if no sound data is updated. 
     On the other hand, the index stage block containing a stage data, as shown in  FIG. 8 , has a valid mark on page 0, a mode interruption mode on page 1, a blank map on page an eternal block blank map on page 3. 
     The back-up block is a back-up for the aforementioned eternal block and is a copy of the eternal block. Consequently, when the eternal block is rewritten, the back-up block is also rewritten. There may be more than one back-up blocks. 
     The work area block is an area for temporarily recording an index data during a sound data recording. As shown in  FIG. 9 , the work area block has an almost identical data configuration as the index stage block. The work area block contains an index number, SP/LP information indicating the recording mode, a sound data upper start address, a sound data lower start address, a sound data upper end address, a sound data lower end address, each of which consists of 1 byte. In this work area block, while reading data from the work area block, the index stage block is rewritten and the data such as the start address is directly written as it is. 
     The PCM data block is an area where a sound data is mainly recorded. AS shown in  FIG. 10 , in the PCM data block, each one page contains besides a sound data, the year, month, day, hour, minute, second, and day of the week created by the timer  33  are also recorded. More specifically, a 512-byte sound data, 1-byte data of year, 1-byte data of month, 1-byte data of day, 1-byte data of hour, 1-byte data of minute, 1-byte data of second, and 1-byte clock set flag are recorded on one page. 
     In the IC recorder  1  having the aforementioned configuration, if the REC button  56  is pressed when no recording or reproduction is carried out, the CPU  32  controls to write a sound data in the semiconductor memory  9 . It is assumed that in the semiconductor memory  9 , already six sound data pieces have been recorded as shown in  FIG. 6 . 
     More specifically, when the REC button  56  is pressed, the CPU  32  reads out from the ROM  31  and executes a program corresponding to the recording operation so that the amplifier  12 , the AGC  13 , and the encoder  14  are actuated and a sound data delayed with a predetermined time via the buffer memory  15  is stored in the PCM data block of the semiconductor memory  9 . 
     For each of the data blocks, the CPU  32  stores a 512-byte sound data ad creates a data of the recording year, month, day, hour, and minute to be recorded together with the sound data in the PCM data block. The CPU  32  controls to write a sound data as one sound data piece in the PCM data blocks of the semiconductor memory  9  until the STOP button is pressed. 
     When the STOP button is pressed, the CPU  32  terminates to control to record the sound data in the PCM data blocks and rewrites the TOC information of the memory  9 . More specifically, the index stage block is rewritten. 
     In the ADR data block of the index stage block containing a file data, the CPU  32  assigns an index number 01 to the 7-th sound data piece and writes in a data of mode setting, start address, and end address. The CPU  32  changes the previous index numbers 01 to 06 respectively to the index numbers 02 to 07 and writes in a data of the mode setting, start address, and end address of the respective index numbers. 
     This processing is illustrated in  FIG. 11 . The CPU  32  assigns the index number 01 to the latest 7-th sound data piece recorded and shift by 1 the previous index numbers 01 to 06 respectively to index numbers 02 to 07 and rewrites the TOC information. That is, the latest sound data piece is recorded in the memory  9  with the index number 1. 
     Next, explanation will be given on reproduction of a sound data. 
     If a user presses the jog dial shown in  FIG. 2  in the direction of the arrow X when the apparatus  1  is in the stop state, the CPU  32  resumes a reproduction. That is, according to an eternal block recognition data of the eternal block from the memory  9 , the CPU  32  recognizes the eternal block and reads out a data from this eternal block. It should be noted that if the CPU  32  fails to recognize the eternal block shown in  FIG. 3 , the CPU  32  recognizes the back-up block and reads out a data from this back-up block. 
     According to an index stage 0 address or index stage 1 address in the eternal block or in the back-up block, the CPU  32  reads out a data of the index stage block. 
     The CPU  32  uses the ADR data block of the index stage block containing a file data to control read-out of a sound data from PCM data blocks. Here, the CPU  32  reads out a sound data in the order of index number 01, index number 02, index number 03, . . . . More specifically, firstly, according to the start address (STH, STM) and end address (ENH, ENM) of the index number 01 in the ADR data block, the CPU  32  reads out a sound data of index number 01. The sound data which has been read out is converted into a sound signal via the decoder  21  and the filter  22  for supply to the loud speaker  24 . Thus, the sound of index number 01 is outputted from the loud speaker  24 . 
     The CPU  32  continues read-out of the sound data from the memory  9  until the STOP button  55  shown in  FIG. 2  is pressed. That is, after the sound of index number 01 is outputted from the loud speaker  24 , the CPU  32  reads out a sound data of index number 02, a sound data of index number 03, . . . in this order. 
     As has been described above, in the IC recorder  1 , as shown in  FIG. 11 , when a new sound data is recorded, it is stored in the semiconductor memory  9  as the latest sound data of index number 01 so that reproduction is carried out in the order of index number 01, index number 02, index number 03, . . . . This is because a sound data of a smaller index number tends to be more important than a sound data of a greater index number. The aforementioned control enables to set an important sound data piece with an earlier index number. Thus, there is no need of searching an important latest sound piece, which enhances operationability. 
     In the IC recorder  1 , it is also possible to add another sound data to a sound data which has been recorded as an additional recording. Here, the CPU  32  executes a processing of step  1  and after shown in  FIG. 12 . 
     For example, if a user presses the REC button  56  while the IC recorder is reproducing a sound data of index number 02 (step S 1 ), the CPU  32  actuates the timer  3  and determines whether the REC button  56  is pressed for 1 second or more (step S 2 ). If it is determined that the REC button  56  has been pressed for 1 second or more, the CPU  32  interrupts the reproduction of the sound data of index number 02 (step S 3 ), and if it is determined that the REC button  56  has not been pressed for 1 second or more, the CPU  32  continues the reproduction. 
     After the reproduction is interrupted, the CPU  32  controls to start recording of a sound inputted from the microphone  11  (step  4 ) and write the sound data in a PCM data block of the memory  9 . The CPU  32  continues the recording until the STOP button  55  is pressed or the storage capacity of the semiconductor memory  9  becomes full (step S 5 ). When the STOP button  55  is pressed or the storage capacity of the semiconductor memory  9  has become full, i.e., there is no more area for writing a sound data, the CPU terminates the recording (step S 6 ). 
     After the reproduction is terminated, the CPU  32  executes rewriting of the TOC information of the sound data (step S 7 ). More specifically, as shown in  FIG. 13 , in the ADR data block of the index stage block containing a file data, the CPU  32  firstly writes a start address (STH, STM) and end address (ENH, ENM) of the index number 01 and index number 02 which were present prior to the recording. Next, the CPU  32  controls to write a start address and end address indicating the recording position of a new sound data which has been recorded additionally as index number 02 and to write again the start address and the like of the sound data of index number 03 and after which were present prior to the recording. Thus, the CPU assigns an index number 02 for a new sound data to be additionally recorded and writes its start address (STH, STM) and end address (ENH, ENM). 
     Consequently, in the C recorder  1 , when the jog dial  60  is operated and reproduction is started, sound data reproduction is carried out in the order of index number 01, index number 02, . . . . Here, as shown in  FIG. 14 , the sound data piece additionally recorded is outputted as index number 02 immediately after the sound data portion of index number 02 which has been recorded in advance. 
     That is, in the IC recorder  1 , it is possible to select one piece from a plurality of pieces already recorded and additionally record a new piece to be added to the selected piece. Thus, the user can record a new data piece with a desired index number to be added to the selected one of the pieces already recorded. This enables to significantly enhance the operationability, eliminating time required for searching a desired piece. This additional recording can be carried out without changing the operation block  50  and accordingly without increasing production costs. 
     In the aforementioned embodiment, explanation has been given on a case an additional recording mode is set in when the REC button  56  is pressed for 1 second or more while a predetermined file is read out from the memory  9  and reproduced, but the additional recording mode is not to be limited to this case. 
     For example, the additional recording mode can be set by the CPU  32  if the REC button  56  is pressed for predetermined period of time (for example, 2 seconds) after the reproduction f file of index number 02 is interrupted by a user. When the additional recording mode is set in, the CPU  32  executes the processing of step S 4  and after so as to record a new sound data as of index number 02 in the semiconductor memory  9 . 
     Next, explanation will be given on the reproduction operation using the jog dial  60  and the configuration of the jog dial  60 . In the IC recorder  1 , a portion of the jog dial  60 , i.e., a portion of the rotational operation member which will be detailed later, is exposed from a cut-off portion  2   c  formed on the upper half of the left side surface  2   b  of the external casing  2 . This jog dial  60  includes a disc-shaped rotation operation member  61  having a rotation center shaft  62  and other members which will be detailed later and most of the members of the jog dial are contained in the external casing and only a portion of the rotary operation member  61  is exposed outside from the cut-off portion  2   c . The rotation operation member  61  of the jog dial  60  can be rotated around the rotation center shaft  62  in the directions of A and B indicated in  FIG. 2 . 
     Furthermore, the rotary operation member  61  of the jog dial  60  is provided in such a manner that the rotary center shaft  62  can be moved in side the external casing  2  in the directions of X and Y indicated in  FIG. 2 . In a normal state, i.e., when the jog dial  60  is in a non-operation state, the member  61  is urged by a spring (not depicted) in the direction of arrow Y so that a portion of the member  61  protrudes from the cut-off portion  2   c . Accordingly, the rotary operation member  61  of the jog dial  60  can be operated by a user so as to rotate in the directions of arrow A and arrow B indicated in  FIG. 2  as well as to move by pressing along plane when almost, orthogonally intersects the rotation center shaft  62 , i.e., in the direction indicated by arrow X in  FIG. 2 , which brings the rotary operation member  61  inside the external casing  2 . 
     When this rotary operation member  61  is rotated in the direction of arrow A or B indicated in  FIG. 2 , the jog dial  60  supplies an output signal according to the rotation angle and rotation speed to the control block  30 . When this rotary operation member  61  is pressed in the direction of arrow X indicated in  FIG. 2 , an output signal corresponding to the pressing time of the member  61  is supplied to the control block  30 . More specifically, in the IC recorder  1 , the control block  30  detects the rotation direction, rotation angle, and rotation speed of the rotary operation member  61 , or detects whether the rotary operation member  61  is pressed and whether the pressing of the rotary operation member  61  exceeds a predetermined period of time. The control block  30  reads out a program from the ROM  31  corresponding to a detection result and executes the program so as to control the operation of the respective components of the apparatus  1 . It should be noted that the control operation by this control block  30  will be detailed later. 
     This jog dial  60  is operated by a user in various cases including a case to carry out various operations in reproduction or a case to modify the initial setting of the aforementioned date and time. That is, this jog dial  60  is used with a high frequency. For this, the jog dial  60  is provided at the side surface of the external casing  2  as shown in  FIG. 2  so that the user can hold the external casing  2  with his/her left hand and rotate and press the rotary operation member  61  which partially protrudes from the cut-off portion  2   c  with his/her left hand thumb alone. 
     Referring to  FIG. 15A ,  FIG. 15B , and  FIG. 16 , configuration of this jog dial  60  will be detailed below.  FIG. 15A  is a front view of the jog dial  60 , i.e., an external view from the main surface  2   a  of the external casing  2 .  FIG. 15B  is an external view from the rear face. As shown in  FIG. 15A  and  FIG. 15B , the jog dial  60  includes the aforementioned rotary operation member  61 , a base member on which this rotary operation member  61  is attached, a leaf-spring-shaped electrode  64 , and four terminals a, b, c, and d which are mounted on the base member  63 . 
     The base member  63  is made from an insulating material and has a main surface portion  63   a  attached inside the external casing  2  so that the entire jog dial  60  is fixed to the external casing  2 . As shown in  FIG. 15B , the base member  63  has a cut-off portion  65  of an elliptic shape having a longer axis in the direction of arrows X and Y. In the cut-off portion  65  is fitted the rotation center shaft  62  of a circular shape provided at the center of one main surface  61   a  of the rotary operation member  61  in such a manner that the shaft  62  can be rotated and shifted in the directions indicated by the arrows X and Y in  FIG. 15B  along a plane which almost orthogonally intersects the rotation center shaft  62 . 
     The electrode  64 , as shown in  FIG. 15A , is made from a leaf spring which has been bent. The electrode  64  has a base end fixed to the base member  63 . The plurality of terminals a, b, c, and d attached to the base member  63  are respectively connected to the control block  30  shown in  FIG. 1 . Here, the terminals a and b function to output an output signal based on the rotation of the rotary operation member  61 . The terminal d functions to supply an input signal based on the pressing of the rotary operation member  61  in the direction of arrow X. The terminal c serves as a common grounding for the terminals a, b, and d. 
     When the rotary operation member  61  is pressed in the direction of arrow X, a tip end  64   a  of the electrode  64  is moved in the direction indicated by arrow X and brought into contact with the other electrode (not depicted). When the electrode  64  is brought into contact with this other electrode (not depicted), the jog dial  60  supplies an output signal from terminal d to the control block  30  which signal indicating that the rotary operation member  61  is pressed by the user. When the pressing of the rotary operation member  61  is stopped, the contact between the electrode  64  and the other electrode (not depicted) is released and supply of the output signal from terminal d to the control block  30  is terminated. The control block  30  detects the output signal supplied from terminal d indicating that the rotary operation member  61  is pressed and detects whether supply of this signal from terminal d has continued for a predetermined period of time. According to a result of the detection, the control block  30  reads out from the ROM  31  a program corresponding to the detection result and executes operation or control according to the program which has been read out. 
     As shown in  FIG. 16 , when the rotary operation member  61  is rotated in the direction of arrow A or B, the jog dial  60  outputs a 2-phase pulse signal. That is, if the rotary operation member  61  is rotated clockwise, i.e., in the direction of arrow B, a signal α is outputted from between the terminals a-c and a signal β, from between the terminals b-c with different phases from each other. Similarly, if the rotary operation member  61  is rotated counterclockwise, i.e., in the direction of arrow A, a signal α is outputted from between terminals a-c and a signal β, from between the terminals b-c with different phases from each other. As shown in  FIG. 16 , a pulse signal is outputted in such a manner that when the rotary operation member  61  is rotated clockwise, the signal β is slightly delayed from the signal β, and when the rotary operation member  61  is rotated counterclockwise, the signal α is slightly delayed from signal β. Consequently, the control block  30  can identify the rotation direction of the rotary operation member  61  by detecting which of the signals α and β has a delayed phase. 
     While the jog dial  60  is rotated by 360 degrees clockwise or counterclockwise, a pulse is generated 15 times by the signal α and signal β, respectively. That is, when the rotary operation member  61  is rotated by 1/15 turn (24 degrees), a pulse is generated by once by the signal α and signal β, respectively. Consequently, the control block  30  can detect the rotation angle of the rotary operation member  61  by counting the number of pulses by using the counter  35 . Furthermore, by counting the number of pulses for a predetermined period of time by using the counter  35 , the control block  30  can detect a rotation speed of the rotary operation member  61 . 
     In the IC recorder  1  having the aforementioned configuration, for example, if the FILE button  51  is pressed prior to carrying out a recording, the control block  30  controls to read out a data from the ROM  31  and icons corresponding to various files appear on the liquid crystal panel  41 . One of the icons on the display panel  41  can be selected by rotating the rotary operation member  61  of the jog dial  60  in the direction of arrow A or B in  FIG. 2  and the selected icon can be specified by pressing the rotary operation member  61  in the direction of arrow X so that a new sound data will be stored in the specified file. If the MENU button  52  is pressed prior to carrying out a recording, the control block  30  reads out from the ROM  31  a data on the initial setting and a initial setting state appears on the liquid crystal display panel  41 . In order to modify a current initial setting, the rotary operation member  61  is rotated in the direction of arrow A or B so as to select a target item. When this selection is complete, the rotary operation member  61  is pressed in the direction of arrow X so that the selected item can be modified. In this state, the rotary operation member  61  is rotated and pressed to modify the initial setting. 
     When the REC start button  55  of the IC recorder  1  is pressed, the IC recorder  1  enters a recording start state. When the user speaks something toward the microphone  11 , a sound data is written in a PCM data block of the semiconductor memory  9  specified by the aforementioned operation of the jog dial  60 . When the STOP button is pressed, the recording state is released. When the sound data is recorded in the semiconductor memory  9 , the aforementioned TOC information and a data on the file number and index number are created as an auxiliary data or a management data by the control block  30  and written into the memory  9 . 
     Next, explanation will be given on reproduction of a sound data recorded or stored in the IC recorder  1 . In the same way as in recording, for example, the FILE button  51  is pressed so that a data is read out from the ROM  31  by the control block and icons corresponding to various files appear on the liquid crystal panel  41 . The rotary operation member  61  of the jog dial  60  is rotated in the direction of arrow A or B to select one of the icons on the liquid crystal panel  41 . When the selection is complete, the rotary operation member  61  is pressed in the direction of arrow X so as to specify the selected icon so that a sound data stored in PCM data blocks of the specified file will be reproduced. On the liquid crystal panel  41  of  FIG. 2 , only 02/37 associated with the index number is displayed for convenience of explanation, but actually, various icons and time appear on the liquid crystal panel  41 . In the example of  FIG. 2 , the denominator  37  represents the number of sound data pieces stored in the memory  9 , and the numerator 02 represents the index number which is currently reproduced or which can be reproduced immediately. In this case, a file contains  37  sound data pieces stored in the memory  9  and a sound data of index number 02 is being reproduced or in a state to be reproduced immediately. 
     Here, when the IC recorder  1  is in the state to be reproduced immediately, reproduction of the sound data of the selected index number is started by operating the rotary operation member  61  of the jog dial  60  as follows. 
     When the rotary operation member  61  is rotated counterclockwise, i.e., in the direction of arrow A, the control block  30  executes a forward search. More specifically, according to the number of pulses based on the signals α and β shown in  FIG. 16 , the control block  30  reads out later index numbers from the semiconductor memory  9  so as to be successively displayed on the liquid crystal panel  41  (in this case, 03/37, 04/37, 05/37 . . . ). On the other hand, if the jog dial  60  is rotated clockwise, i.e., in the direction of arrow B, the control block executes a backward search. More specifically, according to the number of pulses based on the signals α and β, the control block  30  reads out earlier index numbers from the semiconductor memory  9  (in this case, 01, 37, 36 . . . ) so as to be successively displayed on the liquid crystal panel  41 . 
     When the user has found the index number of the sound data to be reproduced and presses the rotary operation member  61 , the control block  30  detects an output signal supplied from the terminal d of the jog dial  60  and controls to read out from the memory  9  the sound data corresponding to the index number selected by operation of the jog dial  60  and start reproduction of the sound data. In this reproduction state, if the rotary operation member  61  is pressed in the direction of arrow X for a short period of time (hereinafter, this operation will be referred to as a short pressing), the control block  30  controls to terminate the sound data reproduction. If the rotary operation member  61  is pressed in the direction of arrow X in this reproduction state for a period of time longer than a predetermined period of time (hereinafter, this operation will be referred to as a long pressing), the control block  30  executes a repeat reproduction which will be detailed later. 
     Next, explanation will be given on various functions upon reproduction in the IC recorder  1 . The IC recorder  1  has, during a reproduction, a function of cue/review reproduction, a function of repeat reproduction, and a function of scan reproduction. These functions can be selected and executed by operating the rotary operation member  61  of the jog dial  60  alone. 
       FIG. 17  shows operations of the rotary operation member  61  associated with the cue/review reproduction in relation to the reproduction state transition. Note that in  FIG. 17 , the rotary operation member  61  is indicated simply as JOG. In order to carry out the cue/review, when or after starting a reproduction, this rotary operation member  61  is continuously pressed in the direction of arrow X while rotated in the direction of arrow A or B by a predetermined angle. As shown in  FIG. 7 , in this embodiment, if the rotary operation member  61  is continuously pressed in the direction of arrow X while rotated counterclockwise, i.e., in the direction of arrow A, the control block  30  controls to execute a cue reproduction, and if the rotary operation member is continuously pressed in the direction of arrow X while rotated clockwise, i.e., in the direction of arrow B, control is made to carry out a review reproduction. This cue/review reproduction operation is continuously carried out while the rotary operation member  61  is maintained in the pressed state in the direction of arrow X, assuming that, for example, a sound data is reproduced with a speed 10 times faster than a normal reproduction speed. On the other hand, if the pressing of the rotary operation ember  61  in the direction of arrow X is released and supply of the output signal from the terminal d of the job dial  60  terminates, the control block  30  terminates this cue/review reproduction operation and switches the mode to the normal speed reproduction. As shown in  FIG. 17 , the control block  30  also controls to switch the mode to the normal speed reproduction if the rotary operation member  61  is rotated clockwise, i.e., in the direction of arrow B during a cue reproduction, or if the rotary operation member  61  is rotated counterclockwise, i.e., in the direction of arrow A during a review reproduction. 
     In the embodiment of the present invention, when the cue reproduction reaches the end of the sound data stored in the memory  9 , control is made to interrupt the cue reproduction and set the mode to the head of the last sound data stored in the memory  9 . On the other hand, when the review reproduction reaches the first sound data stored in the memory  9 , control is made to interrupt the review reproduction and set mode to the head of the sound data stored in the memory  9 . Thus, in the IC recorder  1 , control is made in such a manner that a cue reproduction or a review reproduction will not be terminated other than at the first and the last positions of the sound data stored in the memory  9 . For example, a cue reproduction or a review reproduction will not be terminated at a sound data of index number 03 when a sound data of index numbers 01 to 10 is stored. 
     If a long pressing of the rotary operation member  61  is carried out during a sound data reproduction, the control block  30  executes a repeat reproduction of the sound data piece which is being reproduced. In the embodiment of the present invention, the sound data piece which has been reproduced is repeatedly reproduced by the repeat reproduction. During this repeat reproduction, if the rotary operation member  61  is pressed again in the direction of arrow X or rotated in the direction of arrow A or B, the repeat reproduction is released and mode is switched to the normal reproduction. Also, if the STOP button  54  or ERASE button  56  is pressed during a repeat reproduction, the repeat reproduction is released and the normal reproduction mode is set in. 
     As shown in  FIG. 18 , if a long pressing of the rotary operation member  61  is carried out in the state to be reproduced immediately or in the stop state, the control block executes a scan reproduction. That is, if the rotary operation member  61  is continuously pressed in the direction of arrow X for a predetermined period of time in the state to be reproduced immediately, the control block  30 , according to an output signal from the terminal d, detects the period of time during which the rotary operation member  61  is pressed and controls to start a scan reproduction. Here, the scan reproduction is a reproduction method as follows. When a plurality of sound data pieces are stored in a file of the memory  9 , starting portions of the respective sound data pieces stored in the file are reproduced intermittently and successively for a predetermined period of time (5 seconds for example) for each of the data pieces. Note that in  FIG. 18 , the rotary operation member  61  is indicated simply as JOG. 
     Here, the control block  30  determines whether to execute a scan reproduction by detecting, for example, whether an output signal from terminal d of the jog dial  60  based on the pressing of the rotary operation member  61  in the direction of arrow X is detected for 3 seconds or more continuously. That is, if the output signal from the terminal d is detected for seconds or more from a start of pressing of the rotary operation member  61 , the control block  30  controls to execute a scan reproduction, and if less than 3 seconds from the start of pressing, the control block  30  executes a normal mode reproduction. 
     After a scan reproduction is started, the scan reproduction continues even if the pressing of the rotary operation member  30  in the direction of arrow X is released. When the scan reproduction of the last sound data piece of the file which is being scan-reproduced is complete, the control block  30  stops the IC recorder  1  at the head of the first sound data piece of the file which has been scan-reproduced. 
     During a scan reproduction, if the rotary operation member is rotated in the direction of arrow A or B, the control block  30  controls to switch to a scan reproduction of a sound data of an index number earlier or later by a count value of the counter  35  determined by the number of pulse signals generated by the rotation of the rotary operation member  61 . During this scan reproduction, if a target voice is heard from the loud speaker  24 , the user presses the rotary operation member  61  in the direction of arrow X while the target sound data is being reproduced. When the rotary operation member  61  is pressed, as shown in  FIG. 18 , the control block  30  controls to switch to a normal mode reproduction. Thus, by pressing the member  61  while a scan reproduction is in progress, it is possible to hear the target sound data from the beginning to the end. If the STOP button  54  is pressed during a scan reproduction, the control block  30 , according to an input signal from the operation block  50 , releases the scan reproduction and enters a stop state. 
     In this example, if the ERASE button  56 , the FILE button  51 , or the PRIORITY button  53  is pressed during a scan reproduction, the control block  30  invalidates the input signal issued by pressing these button regardless of the ON/OFF state of the HOLD switch. 
     In the IC recorder  1 , when the rotary operation member  61  is rotated in the direction of arrow A or B, as has been described above, the control block  30  detects the signals α and β based on the output from the terminals a, b, and c of the jog dial  60  to determine the rotation speed of the rotary operation member  61  and executes a processing corresponding to the detected speed. 
       FIG. 18  also shows a processing carried out when the rotary operation member  61  is rotated from the STOP state. As shown in  FIG. 18 , when the rotary operation member  61  is rotated counterclockwise, i.e., in the direction of arrow A from the STOP state, if the rotation speed of the rotary operation member  61  is slow, the control block  30  controls to execute a forward direction search piece by piece and to increment the index number on the liquid crystal panel  41  one by one as the search proceeds. On the other hand, if the rotation speed of the rotary operation member  61  in the direction of arrow A is fast, the control block  30  controls to execute a forward direction search while skipping a number of pieces and to increment the index number of the liquid crystal display panel  41  by more than one at once. 
     Similarly, when the rotary operation member  61  is rotated clockwise, i.e., in the direction of arrow B from the STOP state at a slow rotation speed, the control block  30  controls to execute a backward direction search piece by piece and decrement the index number on the liquid crystal display panel  41  one by one. On the other hand, if the rotation speed of the rotary operation member  61  in the direction of arrow B is fast, the control block  30  executes a backward direction search while skipping a number of pieces and decrement the index number on the liquid crystal display panel  41  by more than one at once. 
     Thus, in the IC recorder  1 , even if a plenty of sound data pieces are stored in the semiconductor memory  9  with the corresponding index numbers, it is possible to carry out a fast rotation of the rotary operation member  61  so that a number of index numbers are skipped so as to quickly find a target index number, i.e., to display the target index number on the liquid crystal display panel  41 . Accordingly, in this IC recorder  1 , an index number search prior to a reproduction is significantly improved, enabling to quickly reproduce a target sound data with a simple operation. 
       FIG. 19  shows a processing carried out when the rotary operation member  61  is rotated in the direction of arrow A or B from a sound data reproduction state. As shown in  FIG. 19 , in the IC recorder  1 , when the rotary operation member  61  is rotated counterclockwise, i.e., in the direction of arrow A from a reproduction state with a slow rotation speed, the control block  30  controls to execute a forward direction search piece by piece. More specifically, the control block  30  controls to increase the index number on the liquid crystal panel  41  one by one and start reproduction at the head of a sound data of the displayed index number. On the other hand, if the rotary operation member  61  is rotated with a fast rotation speed, the control block controls to execute a forward direction search while skipping a number of pieces. More specifically, the control bloc  30  controls to increment the index number on the liquid crystal panel  41  by more than one at once and start a reproduction at the head of a sound data corresponding to the displayed index number. 
     Similarly, when the rotary operation member  61  is rotated clockwise, i.e., in the direction of B from a reproduction state, if the rotation speed f the rotary operation member  61  is slow, the control block  30  controls to execute a backward direction search piece by piece. More specifically, the control block  30  controls to decrement the index number on the liquid crystal display panel  41  one by one and start reproduction at the head of a sound data corresponding to the displayed index number. On the other hand, if the rotation speed of the rotary operation member  61  is fast, the control block  30  controls to execute a backward direction search while skipping a number of pieces. More specifically, the control block  30  controls to decrement the index number of the liquid crystal display panel  41  by more than one at once and start reproduction at the head of a sound data corresponding to the displayed index number. 
     Thus, in the IC recorder  1 , even if there are a number of sound data pieces stored in the semiconductor memory  9 , a simple operation of fast rotation of the rotary operation member  61  enables to quickly find and reproduce the head portion of a target sound data by skipping a number of sound data pieces. This significantly enhances the sound data search efficiency during a reproduction. 
     As has been described above, in the IC recorder  1 , various functions are assigned to the jog dial  60 . This enables to improve the operationability as well as to reduce the size and weight of the entire apparatus. More specifically, a user can carry out all the basic operations during a reproduction with his/her left hand thumb alone to rotate and press the rotary operation member  61  without moving his/her fingers here and there. Because a number of functions are assigned to the jog dial  60 , it is possible to reduce the number of operation buttons and switches as a whole, which facilitates operation of the IC recorder  1  in the visual way as well as realizes reduction of the size and weight of the entire apparatus. 
     The aforementioned storage and reproduction apparatus according to the present invention uses a semiconductor memory. The present invention is not to be limited to the aforementioned embodiment but can be applied to recording apparatuses in general, especially portable type apparatuses which can easily be carried. In the aforementioned embodiment, a sound data recording and reproduction apparatus was detailed, but the present invention may be a recording and reproduction apparatus for recording/reproducing other than a sound data such as a video data.