Patent Publication Number: US-6983251-B1

Title: Information selection apparatus selecting desired information from plurality of audio information by mainly using audio

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an information selection method selecting information associated with an audio information source, and an information selection apparatus employing such an audio information selection method. 
     2. Description of the Background Art 
     As a conventional technique of the method of selecting one information from a plurality of information, a retrieval engine using character information provided on a display is known. However, the task of continuously viewing the screen will be a burden on the user side. Accordingly, attention is now focused on the usage of voice and sound. In the case where a great number of audio media such as radio programs, music CDs and the like are the subject of selection, it will be easier for the user to actually listen to the contents rather than by selection using only character information. 
     A method of selecting information associated with a sound source according to a plurality of sound sources is disclosed in, for example, Japanese Patent Laying-Open No. 10-124292. According to this method, a plurality of sound sources are placed around the user. The audio outputs are basically issued at the same volume. The user distinguishes audibly the audio outputs generated simultaneously and specifies a desired direction to select the information associated with the sound of that direction. More specifically, various audio messages such as “play”, “record”, “rewind” and “stop” are determined for the front, right, back, and left, respectively, as the operation of a video equipment. When the user wants to effect recording, the right direction is to be selected using a pointing device such as a cross pad. Another method disclosed in this publication is devised to facilitate the audible feature of each generated sound by issuing the sound of each audio output with a slight time difference to define sound quality difference (male voice, female voice). 
     A method of playing again information that was missed audibly by the user indicating a certain direction with a single sound source rotating about the user is disclosed in “Dynamic Soundscape: mapping time to space for audio browsing” (CHI97) by Minoru Kobayashi and Chris Schmandt (MIT). According to this method, one sound source moves around a user while issuing audibly various topics at a constant volume and sound quality. In the case where the user missed a certain topic by the ear, the user points out the area providing the audio output of that topic using a pointing device, whereby a sound source is generated at that site. Playback is resumed from the topic that was audibly issued when passing that site of the sound source. In this playback operation, the volume of the former sound source is lowered and the sound source that newly provides the audio output effects playback at a higher volume. Both sound sources move in an orbit at the same time. Up to eight sound sources are allowed simultaneously in this system. 
     However, even if audio output is provided with time difference or with different sound quality corresponding to each direction to facilitate identification of the position of the sound as in the above-described publication, the direction that can be distinguished audibly by the human being is limited to eight directions at most. The case where there are a great number of selection branches cannot be accommodated. Audio output of only single words such as playback or recording as in the case of video reservation is generally of no problem. However, in the case where audio output of continuous contents such as a plurality of news programs is issued, it is difficult to audibly distinguish the contents even if the sound sources are located at less than eight directions. 
     In the present specification, “the position of sound” implies the site from which sound is audibly output, or a direction from which a sound can be heard. 
     In the above method, only one sound is audibly output unless the user provides an input. A plurality of information cannot be obtained at the same time. 
     The telephone push phone service is known as an information selection interface dedicated to audio (method 1). In selecting information, a voice guidance of “Please depress 1 for . . . ” is output. The user depresses an appropriate button according to the voice guidance. 
     Another method is known to operate a system by voice using a speech recognition function (method 2). According to this method, a predetermined operation command is input through voice, or a natural language processing function is added to the speech recognition function to operate the system in the manner of ordinary conversation. 
     A method in which the item to be subjected to selection is altered over time is disclosed in Japanese Patent Laying-Open No. 6-149517. According to this method, the item to be subjected to selection is altered by the user or program request (output at an elapse of a predetermined time). A label of that item is displayed on the screen and a tone scale corresponding to that item is issued from a speaker. The user can select a certain item by carrying out a predetermined input operation when the label of the desired item appears. 
     Method 1 is disadvantageous in that the number of information that can be selected or the button to be depressed differs each time depending upon the contents. The user has to depend upon the voice guidance at every select operation, which is time-consuming. Since the number of buttons that can be depressed increases, the user will not be able to remember the location of each appropriate button. The user will have to depress the appropriate button while confirming the location of each button. This labor is tedious. Particularly in the case where it is dangerous for the user to carry out a task with his/her view off, this button position confirmation will induce danger. 
     Method 2 is disadvantageous in that the user must learn and operate a plurality of types of predetermined voice commands, if any is predetermined. To date, the natural language processing function lacks the ability to recognize the meaning of the word input through an audio input of high degree of freedom. A technique at the level of practical usage is not yet established. 
     According to the technique disclosed in Japanese Patent Laying-Open No. 6-149517, a display device is inevitable. The required information cannot be provided to the user by just through the audio output. Also, the audio information associated with each information corresponds to only the musical scale of a predetermined tone. It will be difficult for the user to master the difference of the tone and the musical interval information. 
     SUMMARY OF THE INVENTION 
     In view of the foregoing, an object of the present invention is to provide an information selection method including a user-friendly user interface employing voice in selecting one desired information out from a plurality of information. 
     Another object of the present invention is to provide a sound information selection apparatus that facilitates selection of desired sound information from a plurality of sound information. 
     A further object of the present invention is to provide a sound information selection apparatus that can have the position change of a sound controlled by the user&#39;s intention. 
     Still another object of the present invention is to provide an information selection apparatus that allows selection of an information source without depending upon only visual recognition. 
     A still further aspect of the present invention is to provide an information selection apparatus that allows the user to identify at one time more information retained by an information source. 
     Yet a further object of the present invention is to provide a sound information selection apparatus that allows the presentation status of sound information to be easily modified according to the user status. 
     Yet another object of the present invention is to provide an information selection apparatus including a user-friendly user interface employing voice in selecting one desired information from a plurality of information. 
     Yet a still further aspect of the present invention is to provide a computer readable recording medium including a user-friendly user interface employing voice in selecting one desired information out from a plurality of information. 
     According to an aspect of the present invention, a method of selecting desired information according to a plurality of sound information includes the steps of time-controlling independently the position of each sound, and selecting a sound. In selecting a sound, information associated with the sound is selected. As a result, a sound selection method can be provided that allows desired sound information to be easily selected from a plurality of sound information. Preferably, the method includes the step of controlling volume in association with the position of each sound. Information can be selected in association with the volume. 
     The step of controlling independently the position of each sound facilitates distinction between each sound by arranging the position of each sound on the circumference of substantially a circle to move in an orbit. 
     Further preferably, the position change of all the sounds can be set earlier than that of the normal time control or returned to the former position. As a result, the position change of sound can be controlled by the user&#39;s intention. 
     According to another aspect of the present invention, an information selection apparatus with a sound source to select desired information includes a unit time-controlling independently the position of each sound, a sound selection unit selecting a sound, and a selector selecting information associated with the sound in response to a selection signal of the sound selection unit. 
     According to a further aspect of the present invention, an information selection apparatus with a sound source to select desired information source from a plurality of information sources includes means for sequentially switching a plurality of information sources as audio information and presenting the same by a sound source, means for selecting audio information relevant to a desired information source from the presented audio information. 
     By presenting an information source as audio information by voice, an information source can be selected without depending upon only visual recognition. By selecting that audio information when presented, an information source can be selected by unitary operation. 
     Preferably, the information selection apparatus includes means for indicating switching of the audio information. 
     This allows switching of the audio information by an indication of the user. Audio information can be presented at a timing suiting the user&#39;s wishes. 
     Further preferably, the switch specify means specifies presentation of audio information presented after or before the currently-presented audio information. 
     Accordingly, switching can be effected by the user&#39;s specification so as to present audio information that was to be presented afterwards or that is already presented during presentation of audio information. Therefore, the user can sequentially refer to information according to his/her wishes. This switching is not limited to audio information immediately preceding or succeeding the currently-presented audio information. Several audio information can be skipped by rewinding or fast-forwarding to present an appropriate audio information. 
     Further preferably, the information source retains information other than the audio information. The information selection apparatus can present the other information when the desired audio information is selected. 
     By presenting information other than the voice information such as image information retained by the information source, another information of audio information that is not presented can be provided in addition to the another information of the currently-presented audio information. Thus, the user can identify at one time more information retained by the information source. 
     The information other than the audio information retained by the information source is preferably image information. Information depending upon the five senses of the user (the tactual sense, the palate, the sense of smell) is allowed as long as it conveys information. For example, information can be presented by conducting a current through the clothing of the user, the scent, the taste, or the like. 
     According to the information stored in information storage unit  816 , main control unit  812  commands play control unit  815  to play the audio information stored in audio storage unit  811  or to play the audio which is the contents of information storage unit  816  converted by audio conversion unit  814 . 
     By presenting information other than audio information such as the image information retained by the information source during presentation of that audio information, the user can identify at one time more information retained by the information source. 
     According to still another aspect of the present invention, an information selection method includes the step of gradually narrowing down the information from categorized information sources by repeating the information selection method. 
     By gradually narrowing down the information out from categorized information sources, the user can easily arrive at the desired information out from a large amount of information sources. 
     According to a still further aspect of the present invention, a recording medium can be applied in which a program is recorded to cause a computer to execute the step of sequentially switching a plurality of information source as audio information and presenting the selected information source by a sound source, and the step of selecting from the presented audio information the audio information relevant to desired information source. 
     According to yet a further aspect of the present invention, an information presentation apparatus presenting a plurality of information as sound information includes a unit to modify, in presenting sound information, the presentation status according to the property of the sound information to be presented or the user status. 
     Accordingly, the presentation status of sound information can be easily modified according to the property such as the length volume, stereo/monaural audio, and sampling frequency of the audio information to be presented and the sound quality depending upon the reproduction hardware, or according to the user status such as the case where the user is aware or not aware of the information preceding or succeeding the information to be presented, or the acceptability of the information applied as sound to the user. 
     Preferably in the information presentation apparatus, the presentation status to be modified includes either the status of presenting at the same time the plurality of sound information with the presentation position changed, or the status of sequentially presenting the plurality of sound information. 
     By selecting the status of presenting sound information simultaneously or sequentially, the sound information can be presented, not in an inflexible manner, but in a more appropriate manner suiting the situation when the information is to be presented as audio output. 
     Further preferably, the information presentation apparatus includes an arrangement unit time-controlling independently the position of sound information for arrangement in presenting the plurality of sound information at the same time with the presentation position changed. The position of each sound is arranged on the circumference of substantially a circle to move in an orbit. The rotation condition and sound placement condition are set according to the property of the sound information to be presented. 
     By arranging the sound information on the circumference of a circle to move in an orbit with the user present at a certain contact point of that circle, the user himself/herself can easily recognize the mutual position relationship of the sound such as the most closest sound information position, the farthest sound position information, and the like in presenting a plurality of sound information at the same time. By setting the rotation condition such as the rotation speed or rotation radius, and the sound placement condition such as the distance between sounds, an information presentation environment suiting each user can be established. 
     The circle on which the sound information is to be arranged does not have to be a complete circle. Depending on the number of sound information presented at the same time or the user&#39;s preference, sound information can be presented with the portion of the circumference of the circle that is most remote from the user cut. 
     Further preferably, the information presentation apparatus includes an arrangement unit time-controlling independently the position of sound information in presenting a plurality of sound information with the presentation position altered. The position of each sound is modified to the position specified by the user independent of rotation of the position of the sound information. 
     By the provision of means for modifying the position of each sound to a position specified by the user independent of the rotation, i.e., without waiting for the orbital motion, sound information associated with the desired information can be obtained immediately within the reach of the user, i.e., obtained at one step without having to depress the “rewind”, “forwarding” buttons several times. 
     Various information selection is allowed according to the information presentation apparatus such as directly calling up another sound from a slight position change of all the sounds being presented. 
     According to yet another aspect of the present invention, an information presentation apparatus groups, when there is difference in the property between each sound information retained by the information, the property of each sound information prior to presenting the sound information. 
     By grouping the property of each sound information and presenting the normalization as sound information after monauralizing the stereo audio in advance when stereo audio and monaural audio are mixed in the sound information in the case where there is difference in the volume level of the sound information, the user can recognize the placement position of the sound information for all sound information. 
     Preferably, the information includes presentation information other than the sound information in the information presentation apparatus. The presentation information other than the sound information can be displayed together in displaying each sound information. 
     By presenting together presentation information other than sound information such as image information or information by touch, the user can obtain more easily the desired information. 
     Further preferably, the information presentation method presenting a plurality of information as at least sound information includes the step of modifying, in presenting sound information, the presentation status according to the property of the sound information to be presented. 
     According to yet a still further object of the present invention, a computer readable recording medium is provided in which a program is recorded to cause a computer to execute the step of presenting a plurality of information as sound information, and the step of modifying the presentation status of the sound information to be presented according to the property thereof. 
     The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an operation image diagram according to a first embodiment of the present invention. 
         FIG. 2  is a control flow chart describing the operation of the first embodiment. 
         FIG. 3  is an operation image diagram according to a second embodiment of the present invention. 
         FIG. 4  is a flow chart to describe the operation of the second embodiment. 
         FIGS. 5A–5C  are operation image diagrams of details of the first embodiment. 
         FIGS. 6A–6C  are operation image diagrams of menu hierarchy. 
         FIG. 7  is a diagram of a structure of an audio selection apparatus. 
         FIG. 8  is a block diagram of an audio information selection apparatus according to a third embodiment of the present invention. 
         FIG. 9  is an operation image diagram of the third embodiment. 
         FIG. 10  is a control flow chart describing the basic operation of the third embodiment. 
         FIG. 11  is a control flow chart showing the modifying manner of the presented information when the present invention is applied to a mail application. 
         FIG. 12  is a control flow diagram showing the modifying manner of the presented information when the present invention is applied to music CD retrieval. 
         FIG. 13  is an operation image diagram according to a sixth embodiment of the present invention. 
         FIG. 14  shows the change in display when an image is used together in the sixth embodiment. 
         FIG. 15  is a block diagram of an audio information selection apparatus according to the sixth embodiment. 
         FIG. 16  is a diagram showing a structure of an apparatus according to a seventh embodiment of the present invention. 
         FIG. 17  is a flow chart describing switching of the information presentation status according to the information presentation apparatus of the seventh embodiment. 
         FIG. 18  is an operation image diagram of a method 1 of the seventh embodiment. 
         FIG. 19  is a control flow chart showing the basic operation of method 1 of the seventh embodiment. 
         FIG. 20  is an operation image diagram of a method 2 of the seventh embodiment. 
         FIG. 21  is an operation image diagram of a format in which an image is employed together in method 1 according to an eighth embodiment of the present invention. 
         FIG. 22  is an operation image diagram of a format in which an image is employed together in method 2 of the eighth embodiment. 
         FIG. 23  is a diagram showing a structure of an apparatus realizing the eighth embodiment of the present invention. 
         FIG. 24  schematically shows another controller according to an information presentation apparatus of the present embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will be described hereinafter with reference to the drawings. 
     First Embodiment 
     Referring to  FIG. 1 , a user  1  listens to a plurality of sounds controlled by a control device  3  through a headphone device  2 . A controller including a rewind button  4 , a select button  5 , and a fast-forward button  6  is provided in control device  3 . Control device  3  carries out the operation to realize the left and right volume adjustment of headphone device  2  or a stereo speaker so as to allow user  1  to recognize sounds P 1 –P 2 N located on a horizontal plane in the front direction of user  1 , and provides control to effect simultaneous play as if the plurality of sounds P 1 –P 2 N at a constant interval move in an orbit. In controlling the rotation of the orbit, the volume is altered according to the rotation so that the volume of a certain sound P is set to the maximum when at a point A closest to the user and to the lowest volume when at a point B farthest from the user. The volume is repeatedly increased and lowered gradually to attain the largest volume at point A and the lowest volume at point B. The relationship of the volume of each sound in  FIG. 1  is established as P 1 &gt;P 2 &gt; . . . &gt;PN&gt;PN+1&lt; . . . &lt;P 2 N, P 2 N&lt;P 1 . This process corresponds the steps up to S 121  in  FIG. 2 . 
       FIG. 2  is a control flow chart describing the operation of the first embodiment. A sports program guidance of a multichannel broadcast will be taken as an example with reference to  FIGS. 1 and 2 . Music or sound corresponding to each sport such as the theme song of a professional wrestler for a professional wrestling match program, the beat of a drum issued at the start of the sumo tournament for a sumo broadcast are prepared to move in an orbit as sound. Also, the sound may be the audio output per se of each broadcast. Here, it is assumed that sound P 1  corresponds to the theme song of a professional wrestler, P 2  corresponds to the drumbeat for sumo, PN+1 corresponds to the sound of a tennis ball hitting a racket, and P 2 N corresponds to the song for supporters of a baseball team. 
     At step S 12 , sounds differing in volume move in an orbit as described above. At step S 13 , the depression of select button  5  at the status of  FIG. 1  when the user decides to select a professional wrestling match program at the maximum volume causes a process to be carried out in which the professional wrestling match is handled as the desired information (S 13 , S 16 , and S 17  in  FIG. 2 ). When another sport is to be selected at the status of  FIG. 1 , the user waits until the desired program is heard at the largest volume or returns the position of each sound to one previous step using fast-forward button  6  or rewind button  4  to obtain the greatest audible output of the program that is to be selected (S 14 ). Then, the position of each sound is advanced by one step (S 15 ). Next, select button  5  is depressed. When a baseball game program, for example, is to be selected at the status of  FIG. 1 , the user waits a little or depresses fast-forward button  6 . When the sumo program is to be selected, the user either waits for a rather long time or depresses rewind button  4  or fast-forward button  6  for the adjustment. Alternatively, selection switches corresponding to respective positions of each sound can be provided so that the user can depress an appropriate selection switch corresponding to the sound that is to be selected. In this case, the desired sound can be directly selected. 
     Referring to step S 12  of  FIG. 2  again, only a predetermined number of programs can be extracted to move in an orbit for selection when there are so many programs that it is difficult for a simultaneous orbital motion of all the programs such as in the case of a movie broadcast guidance of a multichannel broadcast. By replacing at a point B most remote from the user the sound that has not been selected over a predetermined period with information that is not yet included in the orbit, one information can be selected from a great many selection branches (S 122 , S 123  in  FIG. 2 ). In this case, a notify sound that does not disturb the information audit output is sounded in order to indicate that the information has been revised. This method will be described with reference to  FIGS. 5A–5C . When the tennis program has not been selected over a predetermined time in the above-described sports program guidance (refer to  FIG. 5A ), the sound at the head of the sound queue Q (for example, the sound of a golf program) is extracted from queue Q to move in the orbit instead of the tennis program. The sound of the tennis program is set back to the end of queue Q ( FIG. 5B ). At the time when the sound of the golf program attains the maximum volume for the first time, the notify sound is issued together to indicate that is a new program on the orbit( FIG. 5C ). 
     Second Embodiment 
     A second embodiment of the present invention will be described with reference to  FIGS. 3 and 4 . In the present second embodiment, an image is employed in addition to the sound for the purpose of information selection. A controller including a rewind button  4 , a select button  5 , a fast-forward button  6 , a cross pad  7 , and a display device  8  is provided in a control device  31 . User  1  views a plurality of images and hears sound under control of control device  31  through headphone device  2  and display device  8 . Control device  31  provides control to move images D 1 –D 2 N in an orbit corresponding to sounds P 1 –P 2 N, respectively, orbiting at a constant interval in synchronization with the sound using display device  8  to display the image information (S 321  in  FIG. 4 ). Correspondence between the volume and an image is established so that the image is displayed with the largest area when at the maximum volume. Thereafter, the volume is gradually lowered to attain the lowest level of volume. Corresponding to this change in the volume, the area of the corresponding image becomes gradually smaller than the largest area to eventually attain the smallest area. Then, the volume and the area gradually become larger to attain the largest volume and area. 
     In the case where the user is to select information, the user operates a pointer F on display device  8  using a pointing device such as a cross pad  7 , for example, to directly select an image on display device  8 . Alternatively, when that user wishes to select another sports program under the status of  FIG. 3 , the user waits until the desired image is exactly in front and the sound is heard at the largest volume. Instead of waiting, the user can return(S 34 ) or advance(S 35 ) the position of each image and sound by one step to let the desired information to be located in front and hear the sound at the largest volume using fast-forward button  6  or rewind button  4 . Then, select button  5  or cross pad  7  is depressed. In response, the information associated with the sound designated by cross pad  7  is determined as “the desired information” (S 36 ). For example, when a baseball program is to be selected under the state of  FIG. 3 , the user waits for a short time or depresses fast-forward button  6 . When a sumo program is to be selected, the user waits for a longer period of time or depresses rewind button  4  or fast-forward button  6  for adjustment. 
     Referring to step S 32  of  FIG. 4  again, only a predetermined number of programs can be extracted to move in an orbit for selection when there are so many programs that it is difficult for a simultaneous orbital motion of all the programs such as in the case of a movie broadcast guidance of a multichannel broadcast. By replacing the sound that has not been selected over a predetermined period with information that is not yet included in the orbit at a point B most remote from the user, one information can be selected from a great many selection branches (S 322 , S 323 ). 
     When categorization is possible in the case where there are many selection menus, an index of the categories is produced by the sound corresponding to a read out of the label of each index. By selecting that sound, the contents of a relevant category can be made to move in an orbit as a certain sound. 
     Control device  31  may be a personal computer. A drive device  40  of a recording medium  41  is provided at personal computer  31 . A program to cause the personal computer to carry out an operation according to the control flow shown in  FIG. 4  is recorded in recording medium  41 . This applies also to the other embodiments described hereinafter. 
       FIGS. 6A–6C  are operation image diagrams of specific examples. Referring to  FIG. 6A , it is assumed that a sound indicating the category of sports is selected from the menu of sports, movies, music, and drama. Upon selecting that sound, the contents of the relevant category, i.e., the sounds of a baseball program, professional wrestling program, tennis program, sumo program and the like are moved in an orbit. Upon selecting the sound indicating a baseball program in  FIG. 6B , the sound of a baseball match such as Giants versus Tigers, Dragons versus Swallows, Baystars versus Carps, Lions versus Buffaloes corresponding to the lower hierarchy of the category move in an orbit( FIG. 6C ). 
     Following the above description of the method of the first and second embodiments, an apparatus realizing the present invention will be described hereinafter with reference to  FIG. 7 . Referring to  FIG. 7 , a sound information selection apparatus  100  includes a display  8 , a headphone  2 , a hard disk  13 , a memory  14 , a CPU (central processing unit)  15 , and a controller  16  with a cross pad, a select button, a fast-forward button, and a rewind button. A program is supplied via a network or from hard disk  13  in the form of a program medium to be stored in memory  14 . CPU  15  reads the program on memory  14  to control the volume and rotation of a plurality of sounds and supplies the information to headphone  12 . Also, a plurality of images corresponding to the plurality of sounds are adjusted in size and rotation to be supplied to display  11 . Upon indication from controller  16 , CPU  15  determines that the sound and image specified at controller  16  is the desired information of the user. 
     Third Embodiment 
       FIG. 8  is a block diagram showing the main part of an audio information selection system according to a third embodiment of the present invention. The audio information selection system includes a control device  32 , an external information presentation device  82  directed to audio presentation, an external information presentation device  83  directed to presentation other than audio information, and a presentation indication device  84 . Control device  32  includes an audio storage unit  811 , a main control unit  812 , a menu control unit  813 , an audio conversion unit  814 , a play control unit  815  and an information storage unit  816 . External information presentation device  82  includes a headphone, a speaker, and the like for audio presentation. External information display device  83  includes a display or the like for presentation of information other than audio information. Presentation indication device  84  includes a select button, a cross pad, a jog dial, a shuttle ring, a mouse, or the like. In  FIG. 8 , control device  32  is connected to external information display devices  82 ,  83  and presentation indication device  84  with one machine by means of a cable. The present invention is not limited to such a connection, and mutual connection can be established through cable, network, or radio (wave, IR, and the like) communication. 
     According to the information stored in information storage unit  814 , main control unit  812  commands play control unit  815  to play the audio information stored in audio storage unit  811  or to play the audio which is the contents of information storage unit  814  converted by audio conversion unit  812 . 
     When there is an input from presentation indication device  84 , or when there is a command from main control unit  812 , play control unit  815  is directed to switch the presentation information according to menu control unit  813  for playback. 
     The operation of the third embodiment will be described hereinafter with reference to  FIG. 9 . 
     User  1  listens to the audio information sequentially presented by control device  32  through headphone device  2 . This differs from the operation of the previous first and second embodiments. Control device  32  includes a controller with a rewind button  4 , a select button  5 , and a forward button  6 . Control device  32  sequentially switches the audio information corresponding to a plurality of information sources. More specifically, when there is a total of S information P to be presented, information P is sorted from P 1  to PS. Control device  32  sequentially switches the information for presentation such as presenting information P 2  following the presentation of P 1 , presenting information P 3  following the presentation of P 2 , . . . . 
     The sorting sequence (arranged order) of the information presented to the user may reflect the user&#39;s preference corresponding to a preceding selection. 
       FIG. 10  is a control flow chart describing the operation of the third embodiment. An example is taken when the Nth information PN is presented. Upon activation of the system, presentation is initiated from the first information in the order of all the sorted information to be presented (S 201 ). When a button is not depressed during presentation of information PN, information PN+1 is set as the next information to be presented (S 205 ). When N+1 exceeds S, i.e., when presentation up to the Sth information has been effected, the first information is presented again(S 207 ). When a button is depressed during presentation of PN, presentation of PN is suppressed immediately (S 208 ). When the depressed button is the rewind button, the next information to be presented is information PN−1 (S 211 ). When N−1 is 0, i.e., when N is 1, the Sth information is to be presented next (S 214 ). When the depressed button is the forward button, the next information to be presented is PN+1 (S 210 ). In the case N+1 exceeds S, the aforementioned operation is carried out (S 207 ). When the depressed button is the select button, determination is made that information PN is the information desired by the user (S 213 ). 
     Fourth Embodiment 
       FIG. 11  corresponding to a fourth embodiment of the present invention shows the operation flow in a mail application. The method described with reference to  FIG. 10  is repeatedly employed in this example. A mail application will be described hereinafter with reference to  FIGS. 9 ,  10  and  11  as exemplary of the present invention. Upon initiating the application, notification is made of how many mails there are by voice (S 301 ). A voice reading out information of the sender such as “◯◯th mail from ◯◯ (name) . . . ” and a message “END” that ends the application are prepared as the subsequent audio information to be presented. An appropriate audio information is sequentially presented (S 302 ). When the user selects one mail according to the above-described selection means, the date, the name of the sender and label of the selected mail are read out (S 303 ). Then, a message indicating the process with respect to that mail is presented as the audio information (S 304 ). In a similar manner thereafter, the information that can be selected is automatically presented, and the user specifies a selection to proceed the operation using the aforementioned selection means. When it is not necessary to listen to the message from the beginning to the end in order to ascertain the contents of the information, forward button  6  is to be depressed during the presentation of the information. In response, the currently displayed information is skipped to facilitate presentation of the next information. In the case where the user cannot remember the contents of the information already output audibly, rewind button  4  can be depressed to allow presentation of information that is already presented. For example, when the user fails the operation of recording a return mail and wishes to record again, presentation of other messages such as “Transmission is to proceed (S 3081 )” and “Transmission is canceled (S 3082 )” can be skipped by means of forward button  6  to obtain immediately the presentation of “Start recording over again (S 3083 )”. Alternatively, the presentation order of the information can be followed in the opposite direction using rewind button  4  for presentation. 
     By providing three operation buttons which are actually presented by voice and selecting appropriate audio information to proceed the operation, an interface that alleviates the confirmation task of the operation buttons and that can be specified audibly is realized. 
     By dividing the information presentation into four stages, i.e., presentation of a plurality of mails (S 302 ) and a menu of operations for the selected mail (S 304 , S 306 , S 308 ), the required information can be presented to the user corresponding to each situation. Selection of the mail per se and the operation with respect to the selected mail can be effected according to the same method and same buttons. 
     The operation of the memory will be described with reference to  FIGS. 8 and 11  hereinafter. 
     According to the contents of information storage unit  816 , main control unit  812  provides control to enter the number of mails in the appropriate portion of the information “A new mail has arrived. There are now ◯◯ new mails.” (S 301 ) The information is converted into an audio message at audio conversion unit  812 , and play control unit  815  is commanded to play the converted audio message. Then, information of a list of the senders of the received mails stored in information storage unit  816  and that are now converted to the voice of “◯◯th mail, from ◯◯” through audio conversion unit  812  (S 3021 –S 3023 ), and also the message of “End” stored in audio storage unit  811  (S 3024 ) are stored in information storage unit  816  as the mail selection menu. 
     Menu control unit  813  directs play control unit  815  to play in order each information in the stored audio menu S 302 . 
     In the case where user  85  depresses the select button in presentation indication device  84  during playback of the voice reading out the name of the mail sender (S 3021 –S 3023 ), main control unit  812  makes an inquiry to information storage unit  816  as to the label information corresponding to the mail that was currently displayed when the user depressed the button. The relevant information is converted into a voice message indicating the number, sender name, and title label of the selected mail such as “◯th mail from ◯◯ regarding ◯◯” (S 303 ) via audio conversion unit  812 . The converted audio information is stored in information storage unit  816  and played by representation control unit  815 . 
     Then, the voice information reading out the operation that can be carried out with respect to the selected mail such as “Read out (S 3041 )”, “The next mail will be read out (S 3042 )” is provided from audio storage unit  811 , and stored in information storage unit  816  as the function menu (S 304 ). Menu control unit  813  directs play control unit  815  to play in each sequential order the operations in function menu (S 304 ) stored in information storage unit  816 . 
     In a similar manner thereafter, the voice menu is read into information storage unit  816  according to the instruction of user  85 , and audio presentation is directed by menu control unit  813 . 
     The fixed messages of S 3024 , S 304 , S 305 , S 306 , S 307  and S 308  in  FIG. 11  are already stored in audio storage unit  811  as audio messages. In the case of presentation, the audio message is directly read into information storage unit  816  and played by play control unit  815 . 
     In contrast, the messages of S 301 , S 3021 –S 3023  and S 303  differ according to the contents of the mail. The mail contents stored in information storage unit  815  are converted into appropriate speech via audio conversion unit  814 . The converted audio information is stored in information storage unit  815  and played by play control unit  815 . 
     Here, audio conversion unit  814  applies voice synthesization on the text since mail is handled in the present embodiment. Not only voice synthesization, but audio other than the human voice can be handled depending upon the information of interest. 
     The present invention is not limited to a mail application, and is also applicable to the program guidance and the like of music CDs and multichannel broadcasting. 
     Fifth Embodiment 
       FIG. 12  shows the invention of the third embodiment applied to a music CD retrieval system as the fifth embodiment. Upon initiating the system, a voice reading out the genre is presented as information (S 401 ). Upon selecting Japanese music therefrom, a genre of a more detailed level of Japanese music is presented (S 402 ). In a similar manner thereafter, the operation of selecting an index of a category is repeated to select the desired information. It is to be noted that the information at S 402  and S 405  in  FIG. 4  are not the voice synthesization of the index in the category. The audio output of a CD can be used as an index since a keypart of the music in the CD can provide the identification of the contents of that information. Thus, when there are many information that is the target of search, the information can be categorized to provide an index to the user. Accordingly, the desired information is presented to the user. As to the operation of returning to the former operation (return to the hierarchy of one higher level), a button for the function of returning to one previous step can be added to rewind button  4 , select button  5  and forward button in  FIG. 9 . In the case where return to one previous hierarchy is allowed, the audio information of “Return to one previous menu” is presented together with the information to be presented. The user can return to the previous hierarchy by selecting that information. 
     According to the example of  FIG. 12 , desired music information can be obtained by dividing the indexes into seven stages of S 401 , S 402 , S 403 , S 405 , S 406  and S 407  of the menu that can be selected. Also, by adding the message of “Return to one previous menu” in the index information of the seven stages, the information itself can be handled at a level identical to that of the system operation command. 
     One or a plurality of the “Return to one previous menu” message can be prepared in a series of indexes. When there is a great number of indexes, this message can be prepared at a constant interval. 
     In the case where the present invention is applied to the program guidance of a multichannel broadcast, indexes such as for each genre, target age and the like can be prepared in addition to the indexes for each channel and time to facilitate the user&#39;s selection of a desired program. The index label may be presented in the form of a synthesized speech, or in the form of the exact audible output of the program. 
     When a list of the programs that is currently being broadcasted is to be presented according to the method of the present invention, presentation can be provided in a fashion switching the channel for every predetermined time. Alternatively, an audio output characteristic of respective programs can be presented as the program information. In this case where the program of a certain channel changes to another program of that same channel over time, the audio output of the new program is sequentially presented corresponding thereto. 
     Sixth Embodiment 
     The sixth embodiment is directed to presenting information visually and audibly using visual information in addition to the auditory information. The sixth embodiment employing visual information in a supplementary manner will be described hereinafter with reference to  FIGS. 13 and 14 . 
     Referring to  FIG. 13 , user  1  listens to audio information sequentially presented by a control device  33  via headphone device  2 . At the same time, control device  33  provides to a display device  81  image information associated with the presented audio information. A list of all the images for the entire information to be presented is displayed at display device  81 . The display is devised so that the image information corresponding to the information that is currently presented by audio can be identified at a glance by framing the image information with a bold line or the like. 
       FIG. 14  shows the change in the screen of display device  81  when the presented information is switched. Control device  33  is implemented so that the audio information corresponding to a plurality of information sources are presented in a sequentially switched manner, and that the corresponding image information displayed on display device  81  visually attracts attention every time the presented audio is switched. One embodiment is shown in  FIG. 14 , wherein the image information corresponding to the information associated with the information currently presented by audio is enclosed by a bold line. Information G is presented by audio under the status of S 61 . Here, when there is no specification from the user, or when presentation of the next information is directed by the user by the depression of forward button  6 , control device  33  presents information H, and the bold frame is shifted to surround H (S 62 ). In the case where the user depresses the downward key of the cross pad under the status of S 61 , control device  33  determines that the user has specified presentation of information K displayed below G on display device  81 . The audio presentation of G is suppressed and the audio presentation of K is initiated. At the same time, the bold frame is shifted to surround K (S 63 ). 
     Information other than the information that is currently presented by audio can be viewed by employing the image information as described above. Also, information that cannot be specified for presentation by just one depression of rewind button  4  and forward button  6  can be specified using the cross pad. The cross pad used as the pointing device may be a shuttle ring, a jog dial, a mouse, a joy stick or the like. 
     Following the description of the method of the present invention, an audio information selection apparatus according to the third to sixth embodiments will be described hereinafter with reference to  FIG. 15 . 
     An audio information selection apparatus  200  of the third to sixth embodiments includes a headphone  72 , a hard disk  73 , a memory  74 , a CPU  75 , and a controller  76  with a cross pad, a select button, a forward button, a rewind button, and a button to return to the previous hierarchy. A program is supplied via a network or from hard disk  73  in the form of a program medium to be stored in memory  74 . CPU  75  reads out the program on memory  74  and supplies the information to headphone  72 . Also, control is provided to emphasize the image of the information that is currently presented corresponding to the presented audio output. Upon an instruction from controller  76 , CPU  75  determines that the information according to the audio information that was supplied to headphone  72  at the time controller  76  was depressed is the desired information of the user. 
     The present invention is applicable to a wide range as the technique of selecting a desired one out from a menu of a plurality of information in addition to the above-described mail application, CD categorizing, and multichannel broadcasting applications corresponding to the third to fifth embodiments. 
     Seventh Embodiment 
     The seventh embodiment of the present invention is basically similar to the first to third embodiments. The method of presenting the plurality of information as sound information differs from the previous-described embodiments. The block diagram and the system diagram of the audio information selection apparatus are basically similar to  FIGS. 1 and 8 , respectively. The system of the seventh embodiment includes an audio storage unit  111 , a main control unit  112 , a menu control unit  113 , an audio conversion unit  114 , a play control unit  115 , and an information storage unit  116 . 
       FIG. 16  is a block diagram showing the main part of an audio information selection apparatus  300  of the seventh embodiment. Referring to  FIG. 16 , audio information selection apparatus  300  differs from the apparatus of the third embodiment in that control device  11  includes the method of controlling the volume and placement position independently while placing a plurality of information as sound information for simultaneous playing (method 1) and the method of presenting the audio information in a sequentially switching manner (method 2). According to the information stored in information storage unit  816 , a play control unit  815  is directed to play the audio information stored in audio storage unit  811  or to play the audio information which is the contents of information storage unit  816  converted by audio conversion unit  814  by appropriately switching between method 1 and method 2. 
     The flow of directing the switching of the presentation method will be described with reference to  FIG. 17 . Upon activation of the system in response to an instruction from the user (S 1201 ), a series of audio information to be presented is read into the system. Detection is made whether there is audio information longer than the threshold value in the series of information to be presented (S 1202 ). When there is a longer audio information, method 1 (simultaneous playing of sound information) is employed (S 1203 ). Otherwise, method 2 (played in a presentation sequentially switched) is employed (S 1204 ). 
     The threshold value may be a consistent value of the system, or a value set for each user according to the operation history of each user. 
     A step of normalizing the volume or stereo/monaural audio prior to initiating presentation can be carried out(S 1205 ). The system executes the process automatically up to S 1205 , and then initiates presentation(S 1206 ). A switching specification from the user (switching between the methods (S 1207 , S 1208 ), and specifying/canceling normalization of audio parameters (S 1209 , S 1212 )) is always acceptable after initiation of the presentation and until the end of the presentation (S 1210 ). 
     Method 1 will be described with reference to  FIG. 18  schematically showing the operation method and the flow chart of  FIG. 19 . User  1  listens to a plurality of sounds controlled by a control device  11  through a headphone device  2 . A controller including a rewind button  4 , a select button  5 , and a fast-forward button  6  is provided in control device  11 . 
     Control device  11  carries out the operation to realize the left and right volume adjustment of headphone device  2  or a stereo speaker so as to allow user  1  to recognize sounds P 1 –P 2 N located on a horizontal plane in the front direction of user  1 , and provides control to effect simultaneous play as if the plurality of sounds P 1 –P 2 N at a constant interval move in an orbit. In controlling the rotation of the orbit, the volume is altered according to the rotation so that the volume of a certain sound P is set to the maximum when at a point A closest to the user and to the lowest volume when at a point B farthest from the user. The volume is repeatedly increased and lowered gradually to attain the largest volume at point A and the lowest volume at point B. The relationship of the volume of each sound in  FIG. 18  is established as P 1 &gt;P 2 &gt; . . . &gt;PN&gt;PN+1&lt; . . . &lt;P 2 N, P 2 N&lt;P 1 . This process corresponds the steps up to S 7321  in  FIG. 19 . 
     Only a predetermined number of programs can be extracted to move in an orbit for selection when there are so many programs that it is difficult for a simultaneous orbital motion of all the programs such as in the case of a movie broadcast guidance of a multichannel broadcast. By replacing the sound that has not been selected over a predetermined period with information that is not yet included in the orbit at a point B most remote from the user, one information can be selected from a great many selection branches (S 7322 , S 7323  in  FIG. 19 ). In this case, a notify sound that does not disturb the information audit output can sounded in order to indicate that the information has been revised. 
     In the case where the position of the sound is to be slightly advanced or returned, fast-forward button  6  or rewind button  4  is shortly depressed, respectively, in order to control the rotation of the sound. Fast-forward button  6  or rewind button  4  is to be depressed for a rather long time when another sound is to be drawn close. The manner of button depression is not limited to this example. The position change of the sound is controlled in method 1 in response to the step indicating sound position change by the user (S 733  and S 734  in  FIG. 19 ). Including the means for feedback in the button that directs position change can facilitate the perception of the user as to the moved distance of the sound position. Tactual sensation about the moved distance of the sound position by the user can be implemented by adjusting the resistance of the depression of the button. 
     Presentation may be devised to facilitate the usability for the user by altering the parameters related to the sound placement and rotation such as the rotation speed, the rotation radius, the distance between sounds and the like according to the length and the like of the time of play of each sound for method 1. Also, a step or means for commnding the change of the parameters on the user side can be added. 
     Method 2 will be described with reference to  FIG. 20 .  FIG. 20  corresponds to  FIG. 9  of the third embodiment schematically showing the operation contents. User  1  sequentially listens to the audio information presented by control device  11  via headphone device  2 . Control device  11  is provided with a controller including a rewind button  4 , a select button  5  and a forward button  6 . Control device  11  sequentially switches the audio information corresponding to a plurality of information sources for presentation. For example, when there are a total of S information P to be presented, information P is sorted from P 1  to PS. Control device  3  sequentially switches the information for presentation such as presenting information P 2  following the presentation of P 1 , presenting information P 3  following the presentation of P 2 , . . . . 
     The operation of method 2 is similar to that of the third embodiment. Therefore, description thereof will not be repeated. 
     The sorting sequence of the information presented to the user (arranged order) can reflect the user&#39;s preference in selecting previous information in methods 1 and 2. When there is difference in the volume of each audio to be presented, normalization can be carried out prior to presentation to play all the audio at substantially the same volume level. 
     It is needless to say that the sixth embodiment is applicable to the apparatuses for mails and CDs as in the fourth and fifth embodiments. 
     An example of employing the seventh embodiment in processing mails will be described hereinafter. 
     When it is not necessary to listen to the message from the beginning to the end in order to ascertain the contents of the information, depression of forward button  6  in  FIGS. 18 and 20  facilitates the call up of the previous sound when in method 1 and presentation of the next information skipping the currently presented information when in method 2. When the user does not remember the contents of a previous information and wishes to confirm again the contents, depression of rewind button  4  in  FIGS. 18 and 20  allows the previously-presented information to be presented again. 
     By employing method 1 in the case where the menu to be presented is long or when the information is to be obtained auditory while knowing the preceding and succeeding mails and by employing method 2 in the case where the menu to be presented is relatively short and each one is to be listened, information can be presented at the optimum status for the user regardless of the contents of presentation. Switching between the methods can be effected automatically by main control unit  112 . Alternatively, a button for the user to specify switching can be provided so that main control unit  112  executes switching upon receiving the user&#39;s instruction. 
     By providing a common interface including at least a select button  5  with respect to methods 1 and 2 and additionally a rewind button  4  and fast-forward button  6 , the user can obtain information with the same button and same operation even if the method is switched. 
     The operation of the memory is similar to that of the third embodiment. Therefore, description thereof will not be repeated. 
     The method of switching between method 1 and method 2 appropriately corresponding to the seventh embodiment applied to a music CD retrieval system will be described hereinafter. The normal operation is identical to that of the third embodiment. 
     Upon starting the system of the present application, a voice that reads out the genre as information is first presented. In the case of voice information by a guidance speech that can be presented in a relatively short time such as “Pops” and “Classic”, determination is made that method 2 is appropriate. The audio information is sequentially switched and presented to the user according to method 2. In the case where music representative of each genre is employed as an index instead of the voice guidance, to determination is made that method 1 is appropriate. The sound of each music is played and moved in an orbit using method 1 to be presented to the user. In the present example, main control unit  112  switches between method 1 and method 2 depending upon the property of the audio to be presented. Information is presented to the user according to either method 1 or 2. A button that allows switching between method 1 and 2 according to the user&#39;s preference can be applied so that main control unit  112  switches between method 1 and 2 according to the user&#39;s instruction. 
     By providing a common interface that includes at least determination button  5  for methods 1 and 2 and additional rewind button  4  and fast-forward button  6 , the user can obtain information with the same button and operation even if the method is switched. 
     In the case where the present invention is applied to a program guidance of a multichannel broadcast, indexes such as for each genre, target age and the like can be prepared in addition to the indexes for each channel and time to facilitate the user&#39;s selection of a desired program. The index label may be presented in the form of a synthesized speech, or in the form of the exact audible output of the program. 
     When a list of the programs that is currently being broadcasted is to be presented according to the method of the present invention, presentation can be provided in a fashion switching the channel for every predetermined time. Alternatively, an audio output characteristic of respective programs can be presented as the program information. In this case, when the program of a certain channel changes to another program of that same channel over time, the audio output of the new program is sequentially presented corresponding thereto. 
     Here, main control unit  112  can implement determination automatically to switch between method 1 or 2 such as selecting method 1 when the audio output of a program is to be directly output and method 2 when a relatively short audio output such as an index is used. 
     When presentation is effected using method 1 in the case where each audio to be presented is recorded at a different record level, there is a possibility of difference in volume which is one element for the user to recognize the sound placement position that “sound at a remote site is small whereas the sound at a close site is large” may be lost. Presentation can be presented without deteriorating the usability by normalizing the volume of each sound prior to presentation using method 1. By incorporating means to switch between method 1 and method 2, presentation can be provided switched to method 2 with the volume at the same level when the user decides to negate normalization of the volume level. It is also possible to provide presentation by method 1 without altering the volume level even if the audibility is slightly difficult. Thus, a user-friendly presentation means can be selected by the user corresponding to various cases. 
     In the case where there is audio that includes a spatial wide sense such as recording at a concert in the audio to be presented, it may be difficult for the user to identify the location of the sound when presentation is carried out by method 1 using such audio. By converting such audio including this spatial wide sense into monaural audio prior to presentation using method 1, presentation can be provided without deteriorating the usability. 
     The present invention affords an application of presenting candidates of home pages disclosing information preferable for the user in the form of voice in browsing the home page on WWW. More specifically, the home page can be presented in voice form by an appropriate method such as voice-synthesizing the text information on the home page, employing the music information attached to the home page, converting the color information of the home page into sound and the like. 
     By converting the information that is to be presented as a candidate to the user into audio by an appropriate method, information can be presented to the user by method 1 or 2 according to the property (playback time or the like) of the voiced information as audio. The user can browse any type of a plurality of information. 
     Eighth Embodiment 
     The eighth embodiment of the present invention presents information to the user both visually and audibly using visual information in a supplementary manner in addition to the auditory information of the seventh embodiment. The eighth embodiment employing visual information in a supplementary manner will be described with reference to  FIGS. 21 and 22 . 
       FIG. 21  is a schematic diagram showing the operation contents when visual information is employed for method 1. A controller including a rewind button  4 , a select button  5 , a fast-forward button  6 , a cross pad  7 , and a display device  87  is provided in a control device  12 . User  1  views a plurality of images and listens to the sound under control of control device  12  via headphone device  2  and display device  87 . Control device  12  provides control to move images D 1 –D 2 N in an orbit corresponding to sounds P 1 –P 2 N, respectively, orbiting at a constant interval in synchronization with the sound using display device  8  to display the image information. Correspondence between the volume and an image is established so that the image is displayed with the largest area when at the maximum volume. Thereafter, the volume is gradually lowered to attain the lowest level of volume. Corresponding to this change in the volume, the area of the corresponding image becomes gradually smaller than the largest area to attain the smallest area. Then, the volume and the area gradually become larger to attain the largest volume and area. Thus, identification is facilitated of which image corresponds to which sound and where the information is located. Here, the image to be presented may be a still image or a motion picture. 
     In the case where the user is to select information, the user operates a pointer F on display device  8  using a pointing device such as a cross pad  7 , for example, to directly select an image on display device  8 . Alternatively, when that user wishes to select information located at a remote site, the user waits until the desired image is exactly in front and the sound is heard at the largest volume. Instead of waiting, the user can provide control to let the desired information to be located in front and hear the sound at the largest volume using fast-forward button  6  or rewind button  4 . Then, select button  5  or cross pad  7  is depressed. 
       FIG. 22  is an image of the case where visual information is employed for method 2. User  1  sequentially listens to audio information presented by control device  12  via headphone device  2 . At the same time, control device  12  provides to a display device  87  image information associated with the presented audio information. A list of all the images for the entire information to be presented is displayed at display device  87 . The display is devised so that the image information corresponding to the information that is currently presented by audio can be identified at a glance by framing the image information with a bold line or the like. 
     The change in the screen of display device  87  when the presented information is switched is identical to that described with reference to  FIG. 14 . Therefore, description thereof will not be reapeated. 
     An audio information selection apparatus  400  according to the seventh and eighth embodiments will be described hereinafter. 
     Referring to  FIG. 23 , audio information selection apparatus  400  includes a display device  87 , a headphone  2 , a hard disk  1103 , a memory  1104 , a CPU  1105 , and a controller  1106  including a cross pad, a select button, a forward button, a rewind button, a button to return to the previous hierarchy. A program is supplied via network or from hard disk  1103  in the form of a program medium to be stored in memory  1104 . CPU  1105  reads the program on memory  1104  and supplies the read program to headphone  2 . Control is provided to emphasize the image corresponding to the audio that is currently presented. The image is supplied to display device  87 . Upon a command from controller  1106 , CPU  1105  determines that the information corresponding to the audio information supplied to headphone  2  when controller  1106  is depressed is the information desired by the user. 
       FIG. 24  is another example of controller  1106  provided in the information presentation apparatus of the seventh and eighth embodiments. Controller  1106  includes any or all of a volume normalization/cancel command button  21 , a stereo monaural switch button  22 , and a presentation method switch command button  23  in addition to rewind button  4 , select button  5 , forward button  6  and cross pad  7  of controller  1106  shown in  FIG. 23 . The user can command the information presentation status to be modified to effect normalization when the property of the audio information to be presented differs or to group the property of the audio information such as conversion into monaural output. 
     The pointing device of the present invention may also have the function of repeating tactual sensation feedback according to the degree of the operation of the user. More specifically, tactual sensation feedback can be incorporated besides sound and visual recognition of the portion of information. For example, it may be generally difficult for the user to identify the location of sound even if image information is added to the audio information. The pointing device such as a track ball itself can be rotated slowly corresponding to the presentation status of the sound. By applying the tactual sensation feedback such as a smooth move when in the fast-forward operation and a move with slight resistance when in a rewind operation in moving the sound information, the user can recognize more properly the sound position. In the operation of drawing sound information near, the operability of the user side can be improved by applying some feedback such as the tactual sensation in the interface device of the pointing device in synchronization with the rotation of the sound information. 
     The present invention is not limited to the above-described embodiment. The present invention may be a computer-readable recording medium in which a program is recorded to cause a computer to operate as control device  3 . For example, it may be any type of a recording medium such as a magnetic tape, a CD-ROM, an IC card, a RAM card or the like. 
     In addition to the application to mail, CD categorization, multichannel broadcasting, and WWW browsing described in the present specification, the present invention is applicable to a wide range of field as the technique of selecting a desired one from a menu selecting one information from a plurality of information. 
     Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.