Patent Publication Number: US-2004060070-A1

Title: System for distributing videos synchronized with music, and method for distributing videos synchronized with music

Description:
BACKGROUND OF THE INVENTION  
       [0001] 1. Field of the Invention  
       [0002] The invention relates to a system for distributing videos synchronized with a CD purchased by a user, as well as to a method for distributing videos synchronized with a CD purchased by a user.  
       [0003] 2. Description of the Related Art  
       [0004] Rhythmical music is played in a hall of a club or disco club, and videos synchronized with a song often appear on a screen installed in such hall. In the club or the disco club, a disc jockey, also called a DJ, is chiefly in charge of music to be played within the hall, and a visual jockey, also called a VJ (or a “video jockey”), is chiefly in charge of videos. The DJ audibly exhilarates the audience at the club or disco club by synthesizing music. The VJ also visually incites the audience of the club or disco club, by means of synthesizing video materials—which have various contents and a duration of several seconds each—various graphics, characters, and background colors of, thereby making it easy for the audience to dance in the hall or to put on-lookers in a good mood. Videos synchronized with music are instantaneously changed from one video to another in synchronism with music whose rhythm changes momentarily. Videos which arouse the audience&#39;s emotions and make the audience feel refreshed are also adopted by a game by means of which a player presses buttons or steps on predetermined locations in tune with music. Persons who purchase CDs are interested in information about the looks, clothes, and activities of artists, such as singers, as well as in their music. Many artists, such as singers, release promotional videos simultaneously with releasing music. Further, the artists offer information about their activities on TV programs, magazines, or home pages through the Internet. Enterprises which employ artists, such as singers, or their music as advertising means take great interest in how many of the public see an advertisement in association with artists, such as singers, and music.  
       [0005] Conventionally, even when a person visits a club or disco club, listens to music suiting his/her favorites, and views videos suiting his/her tastes, the person encounters difficulty in purchasing a favorite CD and acquiring videos which are synchronized with the song of the CD, are synthesized from various video materials, and momentarily change a screen. Many of the videos are not commercially available. Even when a person attempts to create videos, music rhythmically changes from one musical selection to another, and video materials must be acquired, thus involving consumption of much time. Many cases require artistic sensibilities. For instance, when the VJ attempts to create videos used in a club or a disco club; for example, when three video materials are superimposed one on another on a display screen, video materials to be stacked are positioned, in order from below, as a bottom material, a front material, and a top material. Video materials are changed in synchronism with a musical rhythm, as required. At that time, a determination must be rendered as to how an upper video material is stacked on a lower video material between the bottom and the front or between the front and the top and as to the effect of ink such as a color tone. Various display methods are available with regard to the effect of ink; for example, a method for rendering transparent white portions of an overlap existing between video materials, a method for inverting colors of video materials when the materials overlap each other, and a method for adding colors to a lower video material when video materials overlap each other, thereby rendering the colors of an upper video material into color circles. Moreover, in many situations, bottom and front video materials are rotated horizontally and vertically in synchronism with the rhythm of music; a display time of video material is sharply shortened or elongated; a display range of video material is narrowed to half or one-third a display screen; the position of video material is changed within the display screen; and letters are superimposed on video material and the letters are subjected to rotation or a change in color. In addition, there are employed effects, such as addition of vertical and horizontal stripes to video material, momentary addition of mosaics to video material, or addition of a pattern such as a ripple on a water surface to the entire screen. As described above, difficulty is encountered when an ordinary person attempts to create such videos as those which are created by a VJ in a club or a disco club and synchronized with the rhythm of music.  
       [0006] A person can view videos synchronized with music in the form of a broadcast of musical TV programs, a promotion video, and a video CD, by way of a TV set, a video, and a personal computer. However, videos broadcast on a TV show consist of scenes showing that an artist, such as a singer, is singing on a stage set and are intended for the general public. Many such videos are based on images such as promotion videos. Information about videos of a promotion video or those of a video CD is fixed on mediums such as video tapes. Viewing a new video synchronized with music on the basis of only this information has been impossible. As mentioned above, even when the user has purchased a CD suiting his/her tastes, the user encounters difficulty in acquiring videos synchronized with the music that suits his/her tastes. A technique pertaining to Karaoke described in, JP-A-2000-200089, is described as a technique for synchronizing music and lines with a background image. For example, videos created by a VJ in a club or a disco club must be changed momentarily in strict synchronism with music which changes instantaneously. Further, as mentioned previously, various laborious operations are required. These videos differ in quality from videos whose Karaoke lines and background images change gently and whose background images have no elaborate contents. Many Karaoke distribution companies distribute music. Special information to be used for synchronizing music with videos is inserted into music. As in the case of a problem in a recent CD programmed so as to inhibit duplication of contents with a personal computer, when information about music is processed, exertion of adverse influence on music can be of concern. In light of a problem of copyright on videos and music, easy distribution of music is problematic. When downloaded music or videos are accumulated in a personal computer, there arises a copyright-related problem such as unauthorized transfer of music or videos. Information about activities of artists, such as singers, can be acquired from a TV program, a magazine, or a homepage on the Internet. When fans of an artist, such as a singer, readily attempt to acquire information about activities of the artist, the fans must view a specific TV program, purchase a specific magazine, or access a specific home page, thus suffering complications. In addition to an advertisement employing, as means, TV programs and articles of magazines involving emergence of artists such as singers, or artists such as singers and music appearing in TV programs and magazines, provision of an advertisement which is more readily and frequently exposed to the public eye is important for the enterprises that employ artists, such as singers, and music as advertising means.  
       [0007] In addition, in terms of enhancement of effects and education, important features are the ability to acquire videos showing playing of a symphony performed by a symphony orchestra, music pertaining to RAKUGO (Japanese Comic Stories) and KABUKI music, and videos pertaining to performance of a RAKUGO-KA (Japanese Professional Storyteller) and a KABUKI play in synchronism with sounds. In view of a copyright and the capacity of a CD, acquisition of music and videos synchronized with sound is difficult.  
       SUMMARY OF THE INVENTION  
       [0008] Drawbacks to be solved by the invention are: the means by which user can view videos synchronized with the song of a purchased CD; whether or not synchronized videos can be changed as required; whether or not the user can select videos suiting his/her tastes; how efficiently an artist, such as a singer, informs fans of information about himself/herself; how efficiently an enterprise which provides an advertisement for an artist, such as a singer, as means provides an advertisement; and the means by which copyright of songs and videos can be protected.  
       [0009] As a result of considerable studies being carried out for solving the drawbacks, the following configuration is found to be optimal. A terminal used by the user is connected to a server by utilization of the Internet. If a CD inserted into the terminal is an extra CD, information pertaining to songs recorded on the CD is read. In contrast, if the inserted CD is not an extra CD, a CD ID is read, and information is transmitted to the server. The server stores music information about CD titles and song titles pertaining to songs released by various singers and artists; synchronized video information about videos prepared in synchronism with music list information and predetermined music; and synchronized video list information. In addition, the server stores relevant video information, relevant sound information, and relevant list information, as relevant information. Such relevant information includes, for example, artist video information about activities of an artist such as a singer; artist sound information about sound to be added to the artist video information; advertisement video information about advertisements of enterprises which provide advertisements; advertisement sound information pertaining to sound added to the advertisement video information; offered video information pertaining to information offered to other users by other organizations such as public organizations; offered sound information pertaining to sound to be added to the offered video information; artist list information pertaining to a list of accumulated information; advertisement list information; and offered list information. The server receives read information and input information and, on the basis of the received read information and input information, transmits, to the terminal, predetermined synchronized video information synchronized with music recorded on a CD. On the basis of the received input information, relevant image information, relevant sound information, and relevant list information are transmitted, as required. For instance, the artist video information and the artist sound information are transmitted to the terminal; the advertisement video information and the advertisement sound information are transmitted to the terminal; and the offered video information and the offered sound information are transmitted to the terminal. Upon receipt of the synchronized video information and the relevant video information, the terminal displays, on the screen, videos and lists based on the information items, thereby playing the music recorded on the CD. Consequently, the terminal displays, a video synchronized with music, video information about activities of an artist, and a video of an advertisement. Sound added to the videos is played or output. 
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0010]FIG. 1 is a block diagram of a system;  
     [0011]FIG. 2 is an example list pertaining to music list information;  
     [0012]FIG. 3 is an example list pertaining to synchronized video list information;  
     [0013]FIG. 4 is an example list pertaining to artist list information;  
     [0014]FIG. 5 is an example list pertaining to advertisement list information;  
     [0015]FIG. 6 is an example list pertaining to offered list information;  
     [0016]FIG. 7 is a block diagram of a system B;  
     [0017]FIG. 8 is an example display screen device B; and  
     [0018]FIG. 9 is a block diagram of a system C. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     [0019] The invention will now be described in detail hereinbelow. First, an invention of claim 1 will be described. FIG. 1 is a system block diagram. A terminal  1  comprises a terminal receiver  11 ; a CD drive  12 ; a terminal input device  13 ; a music information reader  14 ; a music information screen device  15 ; a video information screen device  16 ; a changeover button device  17 ; a display screen device  18 ; a performance device  19 ; a synchronization analyzer  20 ; and a terminal transmitter  21 . A server  3  comprises a server receiver  31 ; a music information storage device  32 ; a synchronized video information storage device  33 ; a relevant information storage device  34 ; an information analyzer  35 ; and a server transmitter  36 .  
     [0020] The terminal  1  may be a personal computer or musical equipment capable of being connected to the Internet. One or a plurality of terminals  1  are connected to the server  3  over the Internet. In terms of the ability to transmit a large volume of synchronized video information, broadband communication capable of sending and receiving a large volume of information is preferable. The terminal receiver  11  is a device for receiving music list information, synchronized vide information, and synchronized video list information; for example, relevant video information, e.g., artist video information, advertisement video information, and offered video information; relevant sound information, e.g., artist sound information, advertisement sound information, and offered sound information; and relevant list information, e.g., artist list information, advertisement list information, and offered list information, all being sent by the server transmitter  36 . The terminal receiver  11  does not store synchronized video information, and transmits received information to the synchronization analyzer  20 .  
     [0021] The CD drive  12  is a so-called CD drive for reading information pertaining to music to be recorded on a CD and receives an inserted CD. A CD drive incorporated in a commercially-available personal computer or a CD drive incorporated into predetermined sound equipment may be used as the CD drive. The information read by the CD drive  12  is transmitted to the synchronization analyzer  20  as CD information. The terminal input device  13  enables a user to input information, such as a CD title, a song title, and the name of an artist, in letters and symbols; to select desired information from an at-a-glance list displayed by the music information screen device  15  and the video information screen device  16 ; and to input a selection result or click the changeover button device  17 , thereby selecting information about, e.g., activities of an artist, or information about an advertisement of an enterprise, or information offered by public organizations, and inputting a selection result. The terminal input device  13  may be embodied by a keyboard and a mouse. Even when the music information screen device  15  displays the sound list information and the read information in the form of an at-a-glance list, the terminal input device  13  can delete them, to thereby enable input of a CD title, a song title, or the name of an artist in letters and symbols. Even when the video information screen device  16  displays the synchronized video list information and the relevant list information in the form of an at-a-glance list, the terminal input device  13  deletes them, to thereby enable input of the title of a video in letters and symbols. The terminal input device  13  sends the information entered by the user to the synchronization analyzer  20  as input information. When the CD inserted into the CD drive  12  is an extra CD, the sound information reader  14  reads the title of the extra CD, a song title, and the name of an artist from the extra CD. The information read by the sound information reader  14  is transmitted to the synchronization analyzer  20  as read information. When the CD inserted into the CD drive  12  is not an extra CD, the sound information reader  14  transmits, to the synchronization analyzer  20 , read information indicating a failure to read the title of the CD, a song title, and the name of an artist.  
     [0022] The music information screen device  15  receives the music list information transmitted from the synchronization analyzer  20 . On the basis of music list information, the music information screen device  15  displays, in the form of an at-a-glance list, for example, only a song title; three information items, i.e., a CD title, a song title, and the name of an artist; or an at-a-glance list providing, e.g., the same song titles or the same CD titles. The video information screen device  16  receives the synchronized video list information and the relevant list information sent from the synchronization analyzer  20 . On the basis of the synchronized video list information, the video information screen device  16  displays an at-a-glance list which provides only the titles of videos or into which the titles of videos or the name of a video producer is categorized. On the basis of the relevant list information, e.g., artist list information, the video information screen device  16  displays only the name of an artist or information items pertaining to activities released by the artist, in the form of an at-a-glance list and in ascending chronological order. For instance, when based on an advertisement list information, the video information screen device  16  displays an at-a-glance list showing only names of enterprises which provide advertisements. When based on offered information, the video information screen device  16  displays an at-a-glance list of, e.g., information offered by public organizations.  
     [0023] When the user switches desired information, the changeover button device  17  is to be clicked by the user through use of the terminal input device  13 . For instance, a synchronized video button, an artist information button, an advertisement information button, and an offered information button are provided. When the user has clicked a desired button, the terminal input device  13  transmits information serving as a result of clicking action to the synchronization analyzer  20  as input information. The display screen device  18  receives the synchronized video information and the relevant video information transmitted from the synchronization analyzer  20  and displays videos on the basis of the synchronized video information and the relevant video information. For instance, the videos include videos which are synchronized with music and have been prepared by a VJ in a club or a disco club; videos pertaining to recent activities of a singer or an artist; advertising videos of an enterprise; or videos offered by public organizations. The performance device  19  receives the CD information and the relevant sound information, both being transmitted from the synchronization analyzer  20 . On the basis of the CD information, the performance device  19  plays the music recorded on the CD, thereby playing music and sound on the basis of the relevant sound information.  
     [0024] The synchronization analyzer  20  brings a video into synchronism with music and analyzes the kind of a video, music, and sound to be played and output. The synchronization analyzer  20  receives the music list information, synchronized video information, synchronized video list information, relevant video information, relevant sound information, and relevant list information, all being transmitted by the terminal receiver  11 ; the CD information transmitted from the CD drive  12 ; input information which is transmitted from the terminal input device  13  and includes a CD title, a song title, the name of an artist, and the title of a video, all being input by the user; a result obtained when the user has selected information from the at-a-glance list displayed by the music information screen device  15 ; input information obtained as a result of the user having clicked the changeover button device  17 ; and read information transmitted from the music information reader  14 . The synchronization analyzer  20  transmits the received read information and the received input information to the terminal transmitter  21  and transmits the music list information to the music information screen device  15 .  
     [0025] The synchronization analyzer  20  transmits the synchronized video list information and the relevant list information to the video information screen device  16 . The synchronization analyzer  20  receives the input information which is obtained as a result of the user having selected information from the at-a-glance list displayed by the video information screen device  16 , and transmits the thus-received information to the terminal device  21 . The synchronization analyzer  20  also transmits the received synchronization video information to the display screen device  18 , as well as transmitting the received CD information to the performance device  19 , such that a time at which display of a video is started becomes synchronized with a time at which playing of music is started. Further, the synchronization analyzer  20  also transmits the received relevant video information to the display screen device  18 , as well as transmitting the received relevant sound information to the performance device  19 , such that a time at which displaying of a video is started is synchronized with a time at which performance and output of sound are started. As a result, the user can view and listen to a video and sound, both being synchronized with activities of an artist such as a singer, a video and sound synchronized with an advertisement of an enterprise, and a video and sound, both being synchronized with each other and offered by a public organization. According to the invention, a video and music or sound can be displayed and played synchronously. When the user stops playing of music or sound, the video is also stopped synchronously. The user can acquire a highly-elaborate video, music, and sound. However, the synchronized video information-which has been selected by an information analyzer  35  from the information, such as a title of a video and the name of tempo, input by the user through use of the terminal input device  13  in characters or symbols-is not prepared in synchronism with the music recorded on the CD. Hence, music is not in step with the video. In this case, the synchronization analyzer  20  may not transmit CD information to the performance device  19 .  
     [0026] The terminal transmitter  21  transmits, to a server receiver  31 , the read information and the input information transmitted by the synchronization analyzer  20 . Music list information, synchronized video information, synchronized video list information, relevant video information, relevant sound information, and relevant list information may be transmitted to a server transmitter  36 , thereby inhibiting the terminal  1  from storing information, such as synchronized video information. Consequently, the copyright on a video synchronized with music, that on a video pertaining to activities of an artist such as a singer, and that on voice can be protected.  
     [0027] A server receiver  31  receives the read information and input information transmitted by the terminal transmitter  21  and transmits the read information and the input information to the information analyzer  35 . The music information storage device  32  stores music information and music list information and enables deletion and alteration of music information and music list information in the past, or addition of new music information. The music information relates to the music released in the past by an artist, such as a singer, and is given a designation such as a CD title, a song title, and the name of an artist. In addition, the music information may relate to, e.g., the tempo, length, or genre of music. The music information is associated with synchronized video information about a synchronized video which is prepared such that music information is brought into step with a song of a relevant CD. The music list information stored in the music information storage device  32  may be, e.g., music list information into which a plurality of CD titles, a plurality of song titles, and names of artists are arranged in the form of a list in the order of the Japanese KANA syllabary, or music list information into which currently popular numbers are arranged in the form of a list. The synchronized video information storage device  33  stores synchronized video information and enables deletion or alteration of synchronized video information of the past and addition of new synchronized video information. The synchronized video information is prepared such that associated music information becomes synchronous with the song of a relevant CD, by making a play start time of a song of the CD concurrent with a display start time of a synchronized video. Further, a large number of videos prepared by a VJ, such as those which can be seen in a club or a disco club, are stored, thereby providing the user with a highly-elaborate, high-quality video. Moreover, appropriate deletion or addition of video information enables provision of everlastingly-attractive videos to the user. For instance, a designation, such as the title of a video or the name of tempo, is added to synchronized video information. The synchronized video information includes a video synchronized with a song of a CD or a video synchronized with sound other than a song of a CD, such as Japanese ROKYOKU reciting or Japanese RAKUGO (comic stories).  
     [0028] The relevant information storage device  34  stores relevant information and enables deletion or alteration of relevant information of the past and addition of new relevant information. The relevant information is formed from relevant video information, relevant sound information, and relevant list information, and respective relevant information pieces are assigned designations. FIG. 4 shows an example at-a-glance list pertaining to artist list information; FIG. 5 shows an example list pertaining to advertisement list information; and FIG. 6 shows an example list pertaining to offered list information. As mentioned above, such relevant information items include artist video information pertaining to activities of an artist, e.g., a singer; artist sound information pertaining to sound to be added to the artist video information; advertisement video information pertaining to advertisements of enterprises to be advertised; offered video information pertaining to information offered to other users by other organizations such as public organizations; offered sound information pertaining to sound to be added to the offered video information; artist list information pertaining to a list of stored information items; advertisement list information; and offered list information. The relevant information is not fixed to these categories. For instance, artist video information is described specifically. Information which an artist desires to report by himself/herself is taken as artist video information, and sound to be added to the video is synchronized with the video, to thereby prepare artist sound information. Artist list information is prepared, in which information is arranged in the sequence of information items released in the past or according to categories to which information pertains. The artist list information is stored in the relevant information storage device  34 . For instance, the advertisement video information will be described specifically. Advertisement video information showing an artist, such as a singer, who is taken as advertising means by an enterprise is prepared. Advertisement sound information is prepared such that sound to be added to the video is synchronized with the video. Advertisement list information is prepared, in which information is arranged in the form of a list in the sequence of advertisements released in the past or according to products which are objects of the advertisements. The advertisement list information is stored in the relevant information storage device  34 . For instance, the offered video information will now be described specifically. News and information which the public organization desires to report to the user are visualized, to thereby prepare offered video information. Offered sound information is prepared by bringing sound to be added to a video in synchronism with the video. Offered list information is prepared, in which information is arranged in the form of a list in the sequence of news and information of the past or according to categories of news and information. The offered list information is stored in the relevant information storage device  34 . The respective relevant information items can be deleted or added appropriately, thereby enabling provision of everlastingly-attractive relevant information to the user. Only relevant video information can be offered without relevant sound information to be added to the relevant video information. Conversely, only relevant video information can be offered without relevant sound information. The relevant list information makes it easy for the user to select desired information from enormous amounts of information, thus providing the user with convenience.  
     [0029] On the basis of the read information and the input information, the information analyzer  35  analyzes the nature of information which is to be transmitted from the server transmitter  36  to the terminal receiver  11 . FIG. 2 shows an example at-a-glance list pertaining to music list information. The information analyzer  35  may prepare music list information in advance or after analysis, on the basis of information about a CD title, a song title, and the name of an artist associated with the music information or may prepare music list information on the basis of the read information and the input information. When an inserted CD is an extra CD, when the read information includes a CD title, a song title, and the name of an artist, and when the read information is information formed when the user inputs a CD title, a song title, and the name of an artist through use of the input terminal device  13  in letters and symbols, the information analyzer  35  checks the read information against the music information stored in the music information storage device  32 , thereby analyzing whether or not the music information relates to the same CD title, song title, or artist&#39;s name. If the same CD title, song title, or artist&#39;s name is included in the music information, the music list information about the same CD title, song title, or artist&#39;s name is prepared. If the music information includes a plurality of the same CD titles, song names, or artist&#39;s names, the music list information about the same CD titles, song names, or artist&#39;s names is prepared. Further, if no match is found with the CD title, song name, or artist&#39;s name included in the music information, music list information indicating that no corresponding song is found is prepared. The thus-prepared music list information is transmitted to the server transmitter  36 . In order to avoid occurrence of such complicated operation, the CD inserted into the CD drive  12  is preferably an extra CD in which information about a CD title, a song title, and the name of an artist are recorded. If corresponding music information is not found even when a match has occurred; if the read information states that the inserted CD is not an extra CD and reading of a CD title, a song title, and the name of an artists has failed; or if the user has not entered a CD title, a song title, and the name of an artist, the information analyzer  35  selects and transmits, to the server transmitter  36 , music list information into which a plurality of CD titles, song titles, and artist&#39;s names stored in the music information storage device  32  are arranged in the Japanese KANA syllabary or music list information into which currently-popular songs are arranged in the manner of a list. As a result, the user can easily select information. The server transmitter  36  transmits the received music list information to the terminal receiver  11 , as appropriate. When contents of the input information are limited to one or a plurality of specified music information items stored in the music information storage device  32 , such as information indicating that the user has selected predetermined information from the list on the basis of the music list information displayed on the music information screen device  15 , the information analyzer  35  prepares music list information associated with the corresponding music information, such as a CD title, a song title, and the name of an artist. The thus-prepared music list information is transmitted to the server transmitter  36 . The synchronized video information storage device  33  selects synchronized video information associated with corresponding music information from the stored synchronized video information items.  
     [0030]FIG. 3 is an example list pertaining to the synchronized video list information. The information analyzer  35  prepares synchronized video list information into which video titles or names of tempo pertaining to one or a plurality of synchronized video information items are arranged. The information analyzer  35  may prepare synchronized video list information on the basis of, e.g., a video title or the name of tempo, attached to the synchronized video information or may prepare synchronized video list information on the basis of the input information. Alternatively, the information analyzer  35  checks the information into which the user has entered a video title or the name of tempo in letters or symbols through use of the terminal input device  13  against the synchronized video information stored in the synchronized video information storage device  33 , thereby analyzing whether or not the synchronized video information relates to the same video title or the same name of tempo. If the same video title or the same name of tempo is available, synchronized video list information about the same video title or the same name of tempo is prepared. If a plurality of same video titles or a plurality of same names of tempo are available, synchronized video list information about the video titles or the names of tempo is prepared. Further, if the same video title or the same name of tempo is not available, there is prepared synchronized video list information indicating that no corresponding song is found. The information analyzer  35  transmits the music list information or the synchronized video list information to the server transmitter  36 . The server transmitter  36  transmits the music list information or the synchronized video list information to the terminal receiver  11 , as appropriate. When contents of the input information are limited to one or a plurality of specified music information items stored in the synchronized video information storage device  33 , such as information indicating that the user has selected predetermined information from the list on the basis of the synchronized video list information displayed on the video information screen device  16 , the information analyzer  35  selects corresponding synchronized video information from the synchronized video information storage device  33 . Synchronized video list information about a video name and the name of tempo of the corresponding synchronized video information is prepared, and the synchronized video information and the synchronized video list information are transmitted to the server transmitter  36 . The server transmitter  36  transmits the thus-received synchronized video information and the synchronized video list information to the terminal receiver  11 . When the CD inserted into the CD drive  12  is an extra CD, the information analyzer  35  immediately selects specific music information from the read information and the input information, thereby preparing and selecting the music list information, the synchronized video list information, and the synchronized video information. The thus-prepared-and-selected information may be transmitted to the server transmitter  36 . In this case, the user can view a specifically-synchronized video automatically by inserting the CD into the CD drive  12 .  
     [0031] The information analyzer  35  transmits to the server transmitter  36  the relevant information stored in the relevant information storage device  34 . The information analyzer  35  transmits, e.g., predetermined synchronized video information, to the server transmitter  36 . After the display screen device  18  has displayed the predetermined video information, the information analyzer  35  transmits, e.g., artist list information, artist video information, and artist sound information, from among the relevant list information. Subsequently or prior to the artist list information, the information analyzer  35  may transmit, to the server transmitter  36 , advertisement video information, advertisement sound information, and advertisement list information. When the user clicks, e.g., the changeover button device  17  after analysis of input information, to thereby view information about activities of an artist such as a singer, the information analyzer  35  transmits the artist list information to the server transmitter  36 . Subsequently, the information analyzer  35  may analyze the information input by the use; select artist video information and artist sound information, both pertaining to an artist such as a specific singer, from the relevant information storage device  34 ; and transmit to the server transmitter  36 . Further, the information analyzer  35  checks the input information into which the user has entered the name of an artist or an advertisement title in letters or symbols through use of the terminal input device  13  against the synchronized video information stored in the relevant information storage device  34 , thereby analyzing whether or not the synchronized video information relates to the same name of an artist or the same advertisement title. If the same artist&#39;s name or the same advertisement title is available, the relevant list information about the same artist&#39;s name or the same advertisement title is prepared. If a plurality of same names of artists or a plurality of same titles of advertisements are available, the relevant list information about the artists&#39; names or the names of advertisement are prepared. Further, if no match is found in the artist&#39;s name or the name of advertisement included in the information, relevant list information indicating that no corresponding information is found is selected and transmitted to the server transmitter  36 . The information analyzer  35  may transmit the relevant video information and the relevant sound information to the server transmitter  36  along with the relevant list information. Through analysis of the information entered by the user after transmission of the relevant list information, artist video and sound information about an artist, such as a specific singer desired by the user, may be selected from the relevant information storage device  34 , in which case the thus-selected information is transmitted to the server transmitter  36 .  
     [0032] The server transmitter  36  receives the music list information, the synchronized video information, the synchronized video list information, and the relevant information, all being transmitted by the information analyzer  35 , and transmits the information items to the terminal receiver  11 , as appropriate. As mentioned previously, the server transmitter  36  transmits the music list information, the synchronized video information, the synchronized video list information, and the relevant information to the terminal receiver  11 . Since the terminal  1  does not store the synchronized video information, the copyright on a video and music can be protected. The invention may be implemented by installing custom-designed software into the terminal  1 , which may be a personal computer. Alternatively, custom-designed equipment, such as sound equipment, to be used for implementing the invention may be produced.  
     [0033] [First Embodiment] 
     [0034] Next, an invention of claim 2 will be described. The user connects the terminal  1  to the server  3  by way of the Internet. Information of large size is exchanged in the invention, and hence the terminal  1  and the server  3  are preferably connected together by means of broadband communication over the Internet. The user inserts a CD into the CD drive  12 . When the invention is implemented through use of the custom-designed software installed in the terminal  1 , the user may invoke the custom-designed software to be used for implementing the invention, or custom-designed software may be started automatically. The CD drive reads information about music recorded on the CD, and the thus-read information is transmitted to the synchronization analyzer  20  as CD information. When the CD inserted by the user is an extra CD and a CD title, a song title, and the name of an artist are recorded on the extra CD, the music information reader  14  reads the information about the CD title, the song title, and the name of an artist. The thus-read information is transmitted to the synchronization analyzer  20  as read information. When the CD is not an extra CD, the music information reader  14  transmits, to the synchronization analyzer  20 , read information indicating that information about a CD title, a song title, and the name of an artist cannot be read. When the user has entered a CD title, a song title, and the name of an artist in letters and symbols through use of the terminal input device  13  or when the user has clicked the changeover button device  17 , the terminal input device  13  transmits the information to the synchronization analyzer  20  as input information.  
     [0035] The synchronization analyzer  20  transmits the received read information and input information to the terminal transmitter  21 . The terminal transmitter  21  transmits the thus-received read information and input information to the server receiver  31 . The server receiver  31  transmits the thus-received read information and input information to the information analyzer  35 . The information analyzer  35  analyzes contents of the read information. If the inserted CD is an extra CD and includes a CD title, a song title, and the name of an artist or if a CD title, a song title, and the name of an artist are available as a result of letters or symbols being input by the user, the read information is checked against the music information stored in the music information storage device  32 . When the same music information is found, music list information is prepared from the corresponding one or a plurality of music information pieces. From among the synchronized video information items stored in the synchronized video information storage device  33 , synchronized video information associated with the music information is selected. Synchronized video list information about the corresponding one or a plurality of corresponding synchronized video information items is prepared. The music list information and the synchronized video list information are transmitted to the server transmitter  36 . When corresponding music information is not found through matching, when the contents of the read information indicate that the inserted CD is not an extra CD and reading of a CD title, a song title, and the name of an artist has failed, or when a CD title, a song title, or the name of an artist is determined to be unknown as a result of analysis of the contents of the input information, the information analyzer  35  selects music list information which is stored in the music information storage device  32  and into which a plurality of CD titles, a plurality of song titles, and names of artists are arranged in the form of a list in the order of the Japanese KANA syllabary or music list information into which currently popular numbers are arranged in the form of a list, thereby transmitting the selected information to the server transmitter  36 .  
     [0036] The information analyzer  35  checks the information into which the user has entered a video title or the name of tempo in letters or symbols through use of the terminal input device  13  against the synchronized video information stored in the synchronized video information storage device  33 , thereby analyzing whether or not the synchronized video information about the same video title or the same name of tempo is stored. If the same video title or the same name of tempo is stored, synchronized video list information about the same video title or the same name of tempo is prepared. If a plurality of the same video titles or a plurality of the same names of tempo are stored, synchronized video list information about the video titles or the names of tempo is prepared. Further, if the same video title or the same name of tempo is not stored, synchronized video list information indicating that no corresponding song is found is prepared. The information analyzer  35  transmits the music list information or the synchronized video list information to the server transmitter  36 . The information analyzer  35  analyzes contents of the input information. For instance, if the user desires to view information about activities of an artist instead of a synchronized video, by clicking the changeover button device  17 , the user can select artist list information of the relevant list information stored in the relevant information storage device  34 , and the thus-selected information is transmitted to the server transmitter  36 . The information analyzer  35  checks the information into which the user has entered the name of an artist or an advertisement title in letters or symbols through use of the terminal input device  13  against the synchronized video information stored in the relevant information storage device  34 , thereby analyzing whether or not the synchronized video information relates to the same name of an artist or the same advertisement title. If the same artist&#39;s name or the same advertisement title is included, the relevant list information about the same artist&#39;s name or the same advertisement title is prepared. If a plurality of same names of artists or a plurality of same titles of advertisements are included in the synchronized video information, the relevant list information about the artists&#39; names or the names of advertisement are prepared. Further, if no match is found in the artist&#39;s name or the name of advertisement, relevant list information indicating that no corresponding information is found is selected and transmitted to the server transmitter  36 .  
     [0037] When the CD inserted into the CD drive  12  is an extra CD, the information analyzer  35  immediately selects specific music information from the read information and the input information, thereby preparing and selecting the music list information, the synchronized video list information, and the synchronized video information. The thus-prepared-and-selected information may be transmitted to the server transmitter  36 . In this case, the user can view a specifically-synchronized video automatically by inserting the CD into the CD drive  12 . Moreover, when the user can specify desired synchronized video information or relevant information by entering letters or symbols through use of the terminal input device  13 , the information analyzer  35  may immediately select the specified synchronized video information, the relevant video information, the relevant sound information, and the relevant list information and transmit the information items to the server transmitter  36 . In this case, the user can immediately view and listen to a desired video and information by specifying synchronized video information or relevant information for himself/herself. The server transmitter  36  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and transmits the thus-received information items to the terminal receiver  11 . The terminal receiver  11  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and transmits the thus-received information items to the synchronization analyzer  20 . The synchronization analyzer  20  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information, transmits the music list information to the music information screen device  15 , and transmits the synchronized video list information and the relevant list information to the video information screen device  16 . On the basis of the music list information, the music information screen device  16  receives the music list information and displays an at-a-glance list. The video information screen device  16  receives the synchronized video list information and the relevant list information, thereby displaying an at-a-glance list on the basis of the synchronized list information and the relevant list information. The synchronization analyzer  20  transmits the received synchronized video information to the display screen device  18  and transmits the received CD information to the performance device  19  such that a video display start time is synchronized with a music performance start time. Consequently, the user can view a video synchronized with music. The synchronization analyzer  20  transmits the received relevant video information to the display screen device  18  and transmits the received relevant sound information to the performance device  19  such that the video display start time is synchronized with a time at which playing and output of music and sound are to be started, whereby the user can view a video synchronized with music and sound. However, the synchronized video information—which has been selected by an information analyzer  35  from the information, such as a title of a video and the name of tempo, input by the user through use of the terminal input device  13  in characters or symbols—is not prepared in synchronism with the music recorded on the CD. Hence, music is not in step with the video. In this event, it may be the case that the synchronization analyzer  20  does not transmit CD information to the performance device  19 , and the user enjoys only a video.  
     [0038] The user selects one or a plurality of specific information items from the at-a-glance list displayed on the music information screen device  15  and the video information screen device  16 , through use of the terminal input device  13 , or the user inputs a specific CD title, a specific song title, a specific artist&#39;s name, a specific video title, or a specific name of tempo through use of letters and symbols. The terminal input device  13  transmits the information entered by the user to the synchronization analyzer  20  as input information. The synchronization analyzer  20  transmits the received input information to the terminal transmitter  21 , and the terminal transmitter  21  transmits the thus-received input information to the server receiver  31 . The server receiver  31  transmits the thus-received input information to the information analyzer  35 . The information analyzer  35  analyzes contents of the input information. If the information selected by the user corresponds to one specific music information item or a plurality of specific music information items, the information analyzer  35  prepares music list information on the basis of corresponding music information. The thus-prepared music list information is transmitted to the server transmitter  36 . The information analyzer  35  analyzes contents of the input information. If the information selected by the user corresponds to one specific synchronized video information item or a plurality of specific synchronized video information items, corresponding synchronized video information is selected from the synchronized video information storage device  33 . On the basis of the corresponding synchronized video information, synchronized video list information is prepared, and the synchronized video information and the synchronized video list information are transmitted to the server transmitter  36 . If the information selected by the user does not correspond to one specific music information item or a plurality of specific music information items or if the information selected by the user does not correspond to one specific synchronized video information item or a plurality of specific synchronized video information items, the information analyzer  35  prepares music list information indicating that no corresponding song is available, or synchronized video list information indicating that no corresponding video is available. The thus-prepared list information is transmitted to the server transmitter  36 , thereby again prompting the user to specify information.  
     [0039] The information analyzer  35  again analyzes contents of the received input information and checks the input information against the music information, the synchronized video information, and the relevant information, thereby specifying information desired by the user. When the information desired by the user cannot be specified, the information analyzer  35  again transmits the music list information, the synchronized video list information, and the relevant list information to the server transmitter  36 , thereby again prompting the user to specify information. When the information desired by the user is specified, the information analyzer  35  prepares music list information; selects corresponding synchronized video information, relevant video information, relevant sound information, and relevant list information; prepares synchronized video list information; and transmits the information items to the server transmitter  36 . The server transmitter  36  transmits the received information to the terminal receiver  11 , and the terminal receiver  11  transmits the received information to the synchronization analyzer  20 . The synchronization analyzer  20  transmits the received music list information to the music information screen device  15  and transmits the received synchronized video list information and the relevant list information to the video information screen device  16 . The music information screen device  15  receives the music list information and displays an at-a-glance list on the basis of the music list information. The video information screen device  16  receives the synchronized video list information and the relevant list information, thereby displaying an at-a-glance list on the basis of the synchronized list information and the relevant list information. The synchronization analyzer  20  transmits the received synchronized video information to the display screen device  18  and transmits the received CD information to the performance device  19  such that a video display start time is synchronized with a music performance start time. Consequently, the user can view a video synchronized with music. The synchronization analyzer  20  transmits the received relevant video information to the display screen device  18  and transmits the received relevant sound information to the performance device  19  such that the video display start time is synchronized with a time at which playing and output of music and sound are to be started, whereby the user can view a video synchronized with music and sound. However, the synchronized video information—which has been selected by an information analyzer  35  from the information, such as a title of a video and the name of tempo, input by the user through use of the terminal input device  13  in characters or symbols—is not prepared in synchronism with the music recorded on the CD. Hence, music is not in step with the video. In this event, it may be the case that the synchronization analyzer  20  does not transmit CD information to the performance device  19 , and the user enjoys only a video. In this way, the user can readily view a video synchronized with a purchased CD.  
     [0040] [Second Embodiment] 
     [0041] An invention of claim  3  will now be described. FIG. 7 is a block diagram of a system B. A terminal B 4  comprises a terminal receiver B 41 ; a CD drive B 42 ; a terminal input device B 43 ; a music information reader B 44 ; a music information screen device B 45 ; a video information screen device B 46 ; an operation device  47 ; a display screen device B 48 ; a performance device B 49 ; a synchronization analyzer B 50 ; and a terminal transmitter B 51 . A server B 6  comprises a server receiver B 61 ; a music information storage device B 62 ; a synchronized video information storage device B 63 ; a relevant information storage device B 64 ; an information analyzer B 65 ; and a server transmitter B 66 .  
     [0042] The terminal B 4  may be a personal computer in which custom-designed software is installed and which can be connected to the Internet. Alternatively, the terminal may be sound equipment which displays, plays, and outputs a video, music, and sound over the Internet or a game machine, such as a PlayStation (Registered Trademark), which displays a video, plays music, and outputs sound. The custom-designed software is inserted into an extra CD as a program. When the extra CD is inserted into a CD drive of the personal computer, the personal computer may automatically install the custom-designed software. If the CD is not an extra CD, the user may install custom-designed software beforehand through use of distributed software or may download custom-designed software beforehand from a predetermined WEB page. One or a plurality of terminals B 4  are connected to the server B 6  by way of the Internet. In terms of the ability to transmit a large volume of synchronized video information at high speed, broadband communication capable of sending and receiving a large volume of information is preferable. The terminal receiver B 41  is a device for receiving music list information, synchronized vide information, and synchronized video list information, all being sent by the server transmitter B 66 ; for example, relevant video information, e.g., artist video information, advertisement video information, and offered video information; relevant sound information, e.g., artist sound information, advertisement sound information, and offered sound information; and relevant list information, e.g., artist list information, advertisement list information, and offered list information. The terminal receiver B 41  does not store synchronized video information, and transmits received information to the synchronization analyzer B 50 . When having received the synchronized video information transmitted by the server B 6 , the terminal receiver B 41  transmits a buffering start time as buffering start information and a buffering end time as buffering end information to the synchronization analyzer B 50 . Further, the terminal receiver B 41  receives the in-process playback information transmitted by the synchronization analyzer B 50  and performs buffering operation on the basis of the in-process playback information.  
     [0043] The CD drive B 42  is a so-called CD drive for reading information pertaining to music recorded on a CD. A CD drive incorporated in a commercially-available personal computer or a CD drive incorporated into predetermined sound equipment or a game machine, which implement the invention, may also be used as the CD drive. The information—which is read by the CD drive B 42  and pertains to music and sound—is transmitted to the synchronization analyzer B 50  as CD information. The terminal input device B 43  enables a user to input information, such as a CD title, a song title, and the name of an artist, in letters and symbols; to select desired information from an at-a-glance list displayed by the music information screen device B 45  and the video information screen device B 46 ; and to input a selection result or click a predetermined screen of the display screen device B 48 , thereby selecting information about, e.g., activities of an artist, information about an advertisement of an enterprise, or information offered by public organizations, and inputting a selection result. The terminal input device B 43  is a device to be used for inputting an instruction, such as playback, pause, stop, in-process playback, selection forward, and selection backward of music to be played by use of the operation device  47 , and may be embodied by a keyboard and a mouse. Even when the music information screen device B 45  displays an at-a-glance list on the basis of music list information, the terminal input device B 43  can delete them, to thereby enable input of a CD title, a song title, or the name of an artist in letters and symbols. Even when the video information screen device B 46  displays an at-a-glance list on the basis of the synchronized video list information and the relevant list information, the terminal input device B 43  can delete them, to thereby enable input of the title of a video in letters and symbols. The terminal input device B 43  sends the information entered by the user to the synchronization analyzer B 50  as input information B when the CD inserted into the CD drive B 42  is an extra CD, the sound information reader B 44  reads the title of the extra CD, a song title, and the name of an artist from the extra CD. When the inserted CD is not any extra CD, the music information reader B 44  reads a CDID. The information read by the sound information reader B 44  is transmitted to the synchronization analyzer B 50  as the read information B.  
     [0044] The music information screen device B 45  receives the music list information transmitted from the synchronization analyzer B 50 . On the basis of music list information, the music information screen device B 45  displays a CD title, a song title, or the name of an artist; for example, only a song title; three information items, i.e., a CD title, a song title, and the name of an artist; or an at-a-glance list providing, e.g., the same song names or the same CD titles. The video information screen device B 46  receives the synchronized video list information and the relevant list information sent from the synchronization analyzer B 50 . On the basis of the synchronized video list information, for example, the artist information, the video information screen device B 46  displays an at-a-glance list which provides, e.g., only the video titles, or an at-a -glance list categorized into the video titles or the names of video producers. On the basis of the relevant list information, e.g., artist list information, the video information screen device B 46  displays only the name of an artist or information items pertaining to activities released by the artist, in the form of an at-a-glance list and in ascending chronological order. For instance, when based on advertisement list information, the video information screen device B 46  displays an at-a-glance list showing only names of enterprises which provide advertisement or enterprises to be advertised. When based on offered information, the video information screen device B 46  displays an at-a-glance list of, e.g., information offered by public organizations.  
     [0045] The operation device  47  is a device for effecting playback, pause, stop, in-process playback, selection forward, and selection backward of music to be played and displays, e.g., a playback button, a stop button, and a pause button, on a predetermined location of the display screen device B 48 . The user selects any one button by clicking, e.g., the playback button, the stop button, and the pause button, through use of the terminal input device B 43 . The terminal input device B 43  transmits a selection result to the synchronization analyzer B 50  as input information B.  
     [0046] The display screen device B 48  is a device for receiving and displaying the synchronized video information and the relevant video information transmitted from the synchronization analyzer B 50 . FIG. 8 is an example of the display screen device B 48 . The display screen device B 48  may be divided into a main screen  55  for displaying, e.g., a synchronized video on the basis of synchronized video information; a sub-screen  56  for displaying a recent activity status of an artist from among the relevant video information or a screen of another WEB page; and a small screen  57  for providing an advertisement or information which is as small as a banner advertisement or the like. The display screen device B 48  preferably displays in a separated manner the synchronized video information on the main screen  55 , and relevant video information on the sub-screen  56  or the small screen  57 . The performance device B 49  is a device for receiving CD information transmitted from the synchronization analyzer B 50  and playing and outputting music and sound on the basis of the CD information.  
     [0047] The synchronization analyzer B 50  brings a video into synchronism with music and analyzes the kind of a video, music, and sound to be played and output. The synchronization analyzer B 50  receives the music list information, synchronized video information, synchronized video list information, and relevant information, all being transmitted by the terminal receiver B 41 ; the CD information transmitted from the CD drive B 42 ; input information B transmitted from the terminal input device B 43 ; and read information B transmitted from the music information reader B 44 . The synchronization analyzer B 50  transmits the received read information B and the received input information B to the terminal transmitter B 51 ; transmits the music list information to the music information screen device B 45 ; transmits the synchronized video list information and the relevant list information to the video information screen device B 46 ; transmits the synchronized video information and the relevant video information to the display screen device B 48 ; and transmits the CD information and the relevant sound information to the performance device B 49 .  
     [0048] The synchronization analyzer B 50  specifies, at the head, a playback position for the CD information. Simultaneously with having received buffering start information transmitted by the terminal receiver B 41 , the synchronization analyzer B 50  requests a pause such that received synchronized video information is not transmitted to the display screen device B 48 . The synchronization analyzer B 50  receives buffering end information and synchronized video information; resets a pause for the synchronized video information such that the synchronized video information is synchronized with the CD information; transmits the synchronized video information to the display screen device B 48 ; and transmits the CD information to the performance device B 48 . Consequently, the display screen device B 48  and the performance device B 49  synchronously display and play a video, music, and sound.  
     [0049] When the user has selected desired music from the music information screen device B 45  and a desired video from the video information screen device B 46  through use of the terminal input device B 43 , the terminal input device B 43  transmits the input information B to the synchronization analyzer B 50 ; the synchronization analyzer B 50  transmits the input information B to the terminal transmitter B 51 ; the terminal transmitter B 51  transmits the input information B to the server B 6 ; and the synchronization analyzer  50  extracts the synchronized video information synchronized with desired music and desired synchronized video information from the server B 6 .  
     [0050] When the user has selected a pause button of the operation device  47  by clicking the button through use of the terminal input device B 43 , the terminal input device B 43  transmits the input information B to the synchronization analyzer B 50 . The synchronization analyzer B 50  receives the input information B and requests a pause for transmission of the synchronized video information and the CD information in a synchronized manner, thereby effecting pausing operation. When the user has selected a pause cancel button, the synchronization analyzer  50  cancels a pause for transmission of the synchronized video information and the CD information in a synchronized manner.  
     [0051] The synchronization analyzer  50  computes a time required to effect buffering, from buffering start information and buffering end information. The thus-computed time required for buffering is taken as expected buffering information. The time required to effect buffering is dependent on the level of traffic over the Internet at different times and hence is unstable. For this reason, a time at which buffering would surely be completed is set, and the thus-set time is added to the expected buffering information. Thus, a time at which buffering would surely be completed is taken as buffering information. Tests conducted by the inventor show that adding four to six seconds to the expected buffering information is desirable, to thereby create buffering information. For example, when the user has used the operation device  47  to select in-process playback which is to be started three minutes later from the start of predetermined music on a CD, the terminal input device B 43  transmits the input information B to the synchronization analyzer B 50 . The synchronization analyzer B 50  receives the input information B. After three minutes have lapsed since predetermined music was started, a pause for transmission of CD information is requested. The synchronization analyzer B 50  requests a pause for a synchronized video after three minutes have lapsed since predetermined music was started. The synchronization analyzer B 50  transmits in-process playback information to the terminal input device B 43  such that buffering is started at a time induced by subtracting a time-which is determined as a result of lapse of three minutes since the predetermined music for which the pause has been requested was started-from the time based on the buffering information. On the basis of the in-process playback information, the terminal input device B 43  performs buffering operation and sends synchronized video information to the synchronization analyzer B 50 . The synchronization analyzer B 50  cancels a pause for transmission of the synchronized video information and the CD information after lapse of three minutes since predetermined music was started. Buffering has already been completed by the buffering information after three minutes have lapsed since the predetermined music was started, and hence a synchronized video, music, and sound are synchronized with each other.  
     [0052] The terminal transmitter B 51  is a device for transmitting, to the server receiver B 61 , the read information B and the input information B, both being transmitted by the synchronization analyzer B 50 . The server transmitter B 66  transmits the music list information, the synchronized video information, the synchronized video list information, the relevant video information, the relevant sound information, and the relevant list information. The terminal B 4  does not store the synchronized video information. Consequently, the copyright on a video synchronized with music, that on a video pertaining to activities of an artist such as a singer, and that on sound can be protected.  
     [0053] The server receiver B 61  is a device for receiving the read information B and the input information B, both being transmitted from the terminal transmitter B 51 , and transmitting the thus-received information to the information analyzer B 65 . The music information storage device B 62  is a device which stores music information and music list information and enables deletion and alteration of music information of the past and music list information of the past and addition of new music information. The music information pertains to a CD title, a song title, and the name of an artist with regard to the music released by an artist, such as a singer, in the past. The music information is given a designation and can be checked against the CDID. In addition to the above-described elements, the music information may pertain to, e.g., the tempo, length, and genre of a song. The music information is also associated with the synchronized video information regarding a synchronized video prepared so as to be synchronized with a CD song related to the music information. The music list information stored in the music information storage device B 62  is music list information into which a plurality of CD titles, a plurality of song titles, and names of artists are arranged in the form of a list in the order of the Japanese KANA syllabary, or music list information into which currently popular numbers are arranged in the form of a list. The synchronized video information storage device B 63  is a device for storing synchronized video information and the synchronized video list information and enables deletion or alteration of synchronized video information of the past and addition of new synchronized video information. The synchronized video information is prepared such that the synchronized video information becomes synchronous with the song of a predetermined CD, by making a play start time of a song of the CD concurrent with a display start time of a synchronized video. Further, a large number of videos prepared by a VJ, such as those which can be seen in a club or a disco club, performance of a symphony, a video of a RAKUGO storyteller, and a video of KABUKI, are stored, thereby providing the user with a highly-elaborate, high-quality video. Moreover, appropriate deletion or addition of video information enables provision of ever-attractive videos to the user. For instance, a designation, such as a video title or the name of tempo, is added to synchronized video information. The synchronized video information includes information synchronized with sound other than a song of a CD, such as ROKYOKU or RAKUGO, so long as the information is synchronized with a song of the CD. The synchronized video list information is information into which video information is arranged in the form of a list on the basis of, e.g., a CD title.  
     [0054] The relevant information storage device B 64  stores relevant information and enables deletion or alteration of relevant information of the past and addition of new relevant information. FIG. 4 shows an example at-a-glance list pertaining to artist list information; FIG. 5 shows an example list pertaining to advertisement list information; and FIG. 6 shows an example list pertaining to offered list information. The relevant information is formed from relevant video information, relevant sound information, and relevant list information, and respective relevant information pieces are assigned designations in association with the synchronized video information, the synchronized video list information, the music information, and the music list information. The relevant information is prepared in compliance with and associated with specifications of the sub-screen  56  and the small screen  57  of the display screen device B 48 . The relevant video information and the relevant list information may be, e.g., a WEB page or a banner advertisement. The user may cause a jump to another WEB page by use of the terminal input device B 43 . Such relevant information items include, e.g., artist video information pertaining to activities of an artist, e.g., a singer; artist sound information pertaining to sound to be added to the artist video information; advertisement video information pertaining to advertisements of enterprises to be advertised; advertisement sound information to be added to the advertisement video information; offered video information pertaining to information offered to other users by other organizations such as public organizations; offered sound information pertaining to sound to be added to the offered video information; artist list information pertaining to a list of stored information items; advertisement list information; and offered list information. The relevant information is not fixed to these categories. For instance, artist video information is described specifically. Information which an artist desires to report by himself/herself is taken as artist video information, and sound to be added to the video is synchronized with the video, to thereby prepare artist sound information. Artist list information is prepared, in which information is arranged in the sequence of information items released in the past or according to categories to which information pertains. The artist list information is stored in the relevant information storage device B 64 . For instance, the advertisement video information will be described specifically. There is prepared advertisement video information showing an artist, such as a singer, who is taken as advertising means by an enterprise. Advertisement sound information is prepared such that sound to be added to the video is synchronized with the video. Advertisement list information is prepared, in which information is arranged in the form of a list in the sequence of advertisements released in the past or according to products which are objects of the advertisements. The advertisement list information is stored in the relevant information storage device B 64 . For instance, the offered video information will now be described specifically. News and information which the public organization desires to report to the user are visualized, to thereby prepare offered video information. Offered sound information is prepared by bringing sound to be added to a video in synchronism with the video. A Offered list information is prepared, in which information is arranged in the form of a list in the sequence of news and information of the past or according to categories of news and information. The offered list information is stored in the relevant information storage device B 64 . The respective relevant information items can be deleted or added appropriately, thereby enabling provision of ever-attractive relevant information to the user. Information can be limited to only relevant video information, without the addition of relevant video information. Conversely, information can be limited to only relevant sound information without the addition of relevant video information. The relevant list information makes it easy for the user to select desired information from enormous amounts of information, thus providing the user with convenience.  
     [0055] The information analyzer B 65  is a device which receives the read information B and the input information B, all being output from the server receiver  61 , and which analyzes the nature of information to be transmitted to the server transmitter B 66 , on the basis of the read information B and the input information B. FIG. 2 shows an example at-a-glance list pertaining to music list information. The information analyzer B 65  can prepare music list information on the basis of information about a CD title, a song title, and the name of an artist, all being associated with predetermined music information and synchronized video information. FIG. 3 is an example of an at-a-glance list pertaining to synchronized video list information. The information analyzer B 65  can prepare synchronized video list information into which video titles and the names of tempo pertaining to one or a plurality of synchronized video information items are arranged in the form of a list. When an inserted CD is an extra CD, the information analyzer B 65  analyzes a CD title, a song title, and the name of an artist on the basis of the read information B. The information analyzer B 65  checks the CD title, the song title, and the name of an artist against the synchronized video information stored in the synchronized video information storage device B 63 . Associated predetermined synchronized video information, the synchronized video list information, and the music list information are selected from the synchronized video information storage device B 63  and the music information storage device B 62 . Portions of the synchronized video list information and the music list information are prepared. The thus-selected information and the thus-prepared information are transmitted to the server transmitter B 66 . In this way, when an extra CD is used, the synchronized video information or the like can be transmitted efficiently. When the inserted CD is not an extra CD, the information analyzer B 65  analyzes the CDID on the basis of the read information B; checks the CDID against the music information stored in the music information storage device B 62 ; selects the predetermined synchronized video information and the synchronized video list information, both being associated with the music information, from the synchronized video information storage device B 63  and the music information storage device B 62 ; prepares portions of the synchronized video list information and the music list information; and transmits the thus-prepared information to the server transmitter B 66 . On the basis of the input information B, the user selects desired music and synchronized video information associated with a synchronized video synchronized video from the music information screen device B 45  and the video information screen device B 46 , and synchronized video list information and music list information from the synchronized video information storage device B 63  and the music information storage device B 62 , through use of the terminal input device B 43 ; and the information analyzer B 65  prepares portions of the synchronized video list information and the music list information and transmits the thus-prepared information to the server transmitter B 66 . When the user has selected a CD title, a song title, and the name of an artist in letters and symbols on the basis of the input information B, the information analyzer B 65  checks the thus-selected information against the music information stored in the music information storage device B 62  and the synchronized video information stored in the synchronized video information storage device B 63 ; selects the predetermined synchronized video information, the synchronized video list information, and the music list information from the synchronized video information storage device B 63  and the music information storage device B 62 ; prepares portions of the synchronized video list information and the music list information; and transmits the thus-prepared information to the server transmitter B 66 . When the synchronized video desired by the user is not available, the information analyzer B 65  prepares music list information and synchronized video list information, both stating that no corresponding music or video is available. The thus-prepared list information is transmitted to the server transmitter B 66 . Even in this case, predetermined relevant information may be selected and transmitted to the server transmitter B 66 . In order to avoid occurrence of such complication operation, the CD inserted into the CD drive B 42  is preferably an extra CD in which information about a CD title, a song title, and the name of an artist are recorded. If corresponding music information is not found even when a match has occurred, music list information into which a plurality of CD titles, song titles, and artist&#39;s names stored in the music information storage device B 62  are arranged in the Japanese KANA syllabary or music list information into which currently-popular songs are arranged in the manner of a list is selected and transmitted to the server transmitter B 66 . As a result, the user can easily select information.  
     [0056] The information analyzer B 65  transmits the relevant information stored in the relevant information storage device B 64  to the server transmitter B 66 . The information analyzer B 65  selects the selected synchronized video information, the music information, the synchronized video list information, and the relevant information associated with the music list information and transmits the thus-selected information to the server transmitter B 66 . When the name of information about the associated artist or advertisement is available, the information analyzer B 65  selects relevant list information pertaining to information about that artist or advertisement. When a relevant video is available, the associated video information is selected. When associated music and sound are available, relevant sound information is selected. The thus-selected information is transmitted to the server transmitter B 66 . If no relevant artist or advertisement is available, relevant list information indicating that no corresponding information is available is selected. The relevant information may be transmitted to the server transmitter B 66 .  
     [0057] The server transmitter B 66  is a device for receiving the music list information, the synchronized video information, the synchronized video list information, and the relevant information, all being transmitted by the information analyzer B 65 , and transmitting the information items to the terminal receiver B 41 , as appropriate. As mentioned previously, the server transmitter B 66  transmits the music list information, the synchronized video information, the synchronized video list information, and the relevant information to the terminal receiver B 41 . Since the terminal B 4  does not store the synchronized video information, the copyright on a video and music can be protected.  
     [0058] [Fourth Embodiment] 
     [0059] An invention of claim 4 will now be described. FIG. 9 is a block diagram of a system C. A terminal C 7  comprises a terminal receiver C 41 ; a CD drive B 42 ; a terminal input device B 43 ; a music information reader B 44 ; a music information screen device B 45 ; a video information screen device B 46 ; an operation device  47 ; a display screen device B 48 ; a performance device B 49 ; a synchronization analyzer C 52 ; a terminal transmitter B 51 ; a CD storage device  53 ; and a stability determination device  54 .  
     [0060] The terminal C 7  may be a personal computer in which custom-designed software is installed and which can be connected to the Internet. Alternatively, the terminal may be sound equipment which displays, plays, and outputs a video, music, and sound over the Internet, or a game machine, such as a PlayStation (Registered Trademark), which displays a video, plays music, and outputs sound. The custom-designed software is inserted into an extra CD as a program. When the extra CD is inserted into a CD drive of the personal computer, the personal computer may automatically install the custom-designed software. If the CD is not an extra CD, the user may install custom-designed software beforehand through use of distributed software or may download custom-designed software beforehand from a predetermined WEB page. One or a plurality of terminals C 7  are connected to the server B 6  by way of the Internet. In view of the ability to transmit a large volume of synchronized video information at high speed, broadband communication capable of sending and receiving a large volume of information is preferable. The CD information storage device  53  is a device into which the synchronization analyzer C 52  stores CD information.  
     [0061] In addition to performing the functions of the synchronization analyzer B 50 , the synchronization analyzer C 52  can store CD information into the CD information storage device  53  and extract CD information from the CD information storage device  53 . In synchronism with transmission of synchronized video information to the display screen device B 48 , the synchronization analyzer C 52  extracts CD information stored in the CD information storage device and transmits the thus-extracted information to the performance device B 49 . In this way, the synchronization analyzer C 52  can achieve synchronization by either of two methods: that is, a method for achieving synchronization by issuing a pause for transmission of the synchronized video information to the display screen device B 48 , and a method for achieving synchronization by storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device. Variations arise in the speed at which the CD drive  42  reads the CD information, because of circumstances of an electrical system. Hence, either one of the two methods enables realization of stability with enhanced accuracy. In the case of the method in which synchronization is achieved by issuing a pause for transmission of synchronized video information to the display screen device B 48 , the synchronization analyzer C 52  measures a time lag between the synchronized video and music. The time lag is sent to the stability determination device  54  as time lag information A. In the case of the method in which synchronization is achieved by storing CD information in the CD information storage device  53  and extracting the CD information from the CD information storage device  53 , a time lag between a synchronized video and music is measured and the time lag is sent to the stability determination device  54  as time lag information B. The synchronization analyzer C 52  receives the stability information from the stability determination device  54  and analyzes contents of the stability information. When contents of the stability information indicate selection of a method for achieving synchronization by issuing a pause for transmission of the synchronized video information to the display screen device B 48 , the synchronization analyzer C 52  brings the synchronized video in synchronism with music by the method. Conversely, when contents of the stability information indicate selection of a method for achieving synchronization by storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device  53 , the synchronization analyzer C 52  brings the synchronized video in synchronism with music by the method. Moreover, the synchronized video can be brought in step with music by combination of a method for achieving synchronization by issuing a pause for transmission of synchronized video information to the display screen device B 48 , such as extraction of CD information from the CD information storage device  53  when a pause for transmission of the synchronized video information to the display screen device B 48  is canceled and transmission of the CD information to the performance device B 49  in synchronism with cancellation of the pause; and a method for achieving synchronization by extracting the CD information from the CD information storage device  53 .  
     [0062] The stability determination device  54  is a determination device which determines that higher stability is achieved by adoption of the method for achieving synchronization by issuing a pause for transmission of synchronized video information to the display screen device B 48  or adoption of the method for achieving synchronization by storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device  53 . The stability determination device  54  receives the time lag information A and the time lag information B, both being transmitted from the synchronization analyzer C 52 . The stability determination device  54  analyzes contents of the time lag information A and those of the time lag information B, thereby determining time lag information having a smaller value. For instance, when the time lag information A has a smaller value than that of the time lag information B, there is prepared stability information indicating selection of a method for achieving synchronization by issuing a pause for transmission of synchronized video information to the display screen device B 48 . In contrast, when the time lag information B has a value smaller than that of the time lag information A, there is prepared stability information indicating selection of a method for storing CD information into the CD information storage device  563  and extracting the CD information from the CD information storage device  53 . The thus-prepared stability information is transmitted to the synchronization analyzer C 52 . Functions and explanations of other devices of the fourth embodiment are the same as those described in connection with the third embodiment in which the synchronization analyzer B is replaced with the synchronization analyzer C.  
     [0063] [Fifth Embodiment] 
     [0064] An invention of claim 5 will now be described. The user connects the terminal device B 4  to the server B 6  by way of the Internet. In the invention, information of large size is exchanged, and hence broadband communication over the Internet is preferable. Preferably, the user installs custom-designed software into a personal computer through use of distributed software, or downloads custom-designed software from a predetermined WEB site. When an extra CD is used, a program of custom-designed software is inserted into the extra CD. After the extra CD has been inserted into the personal computer, the custom-designed software may start automatically. Alternatively, the user may also use sound equipment or a game machine, which implements the invention. The user inserts a CD into the CD drive B 42 . The CD drive B 42  sends information about the read music and sound to the synchronization analyzer B 50 . When the CD inserted into the CD drive B 42  is an extra CD, the music information reader B 44  reads a CD title, a song title, and the name of an artist from the extra CD. When the CD is not an extra CD, the music information reader B 44  reads a CDID, and the read information is transmitted to the synchronization analyzer B 50  as read information B. When the user has entered a CD title, a song title, and the name of an artist in letters and symbols, the terminal input device B 43  transits the result of selection performed by the user to the synchronization analyzer B 50  as input information B. Even when merely a CD is inserted into the CD drive, the music information reader B 44  automatically reads information or a CDID on the extra CD and transmits the thus-read information or the CDID to the synchronization analyzer B 50 . Hence, the user can perform easy operation.  
     [0065] The synchronization analyzer B 50  transmits the received read information B and the received input information B to the terminal transmitter B 51 . The terminal transmitter B 51  transmits the thus-received read information B and input information B to the server receiver B 61 . The server receiver B 61  transmits the thus-received read information B and the input information B to the information analyzer B 65 . The information analyzer B 65  analyzes contents of the read information B. When the inserted CD is an extra CD and has a CD title, a song title, and the name of an artist, the information analyzer  65  checks the thus-selected information against the music information stored in the synchronized video information storage device B 63 ; selects the predetermined synchronized video information, the synchronized video list information, and the music list information from the synchronized video information storage device B 63  and the music information storage device B 62 ; prepares portions of the synchronized video list information and the music list information; and transmits the thus-prepared information to the server transmitter B 66 . Thus, when the extra CD is used, the synchronized video information or the like can be transmitted efficiently. When the inserted CD is not an extra CD, the information analyzer  65  analyzes the CDID from the read information B; checks the thus-selected information against the music information stored in the music information storage device B 62 ; selects the predetermined synchronized video information, the synchronized video list information, and the music list information, all being associated with the music information, from the synchronized video information storage device B 63  and the music information storage device B 62 ; prepares portions of the synchronized video list information and the music list information; and transmits the thus-prepared information to the server transmitter B 66 . Thus, when the extra CD is used, the synchronized video information or the like can be transmitted efficiently. When the user has selected a CD title, a song title, or the name of an artist in letters and symbols on the basis of the input information B, the information analyzer B 65  checks the thus-selected information against the music information stored in the music information storage device B 62  and the synchronized video information stored in the synchronized video information storage device B 63 ; selects the predetermined synchronized video information, the synchronized video list information, and the music list information from the synchronized video information storage device B 63  and the music information storage device B 62 ; prepares portions of the synchronized video list information and the music list information; and transmits the thus-prepared information to the server transmitter B 66 . When the synchronized video desired by the user is not available, the information analyzer B 65  prepares music list information and synchronized video list information, both stating that no corresponding music or video is available. The thus-prepared list information is transmitted to the server transmitter B 66 . Even in this case, predetermined relevant information may be selected and transmitted to the server transmitter B 66 . In order to avoid occurrence of such complication operation, the CD inserted into the CD drive B 42  is preferably an extra CD in which information about a CD title, a song title, and the name of an artist are recorded. If corresponding music information is not found even when a match has arisen, the information analyzer B 65  may select music list information into which a plurality of CD titles, song titles, and artist&#39;s names stored in the music information storage device B 62  are arranged in the Japanese KANA syllabary or music list information into which currently-popular songs are arranged like a list and may transmit the thus-selected information to the server transmitter B 66 . As a result, the user can easily select information.  
     [0066] The information analyzer B 65  selects relevant information which is associated with predetermined synchronized video information, the synchronized video list information, the music information, and the music list information. The thus-selected relevant information is sent to the server transmitter B 66 . When relevant information about activities of a predetermined artist is available, artist video information and artist sound information are transmitted. For instance, when relevant information relating to a predetermined advertisement is available, advertisement video information is transmitted. The server transmitter B 66  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and transmits the thus-received information to the terminal receiver B 41 .  
     [0067] The terminal receiver B 41  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and sends the music list information, the synchronized video list information, and the relevant information to the synchronization analyzer B 50 . The terminal receiver B 41  transmits the buffering start time as buffering start information and a buffering end time as buffering end information to the synchronization analyzer B 50 . The synchronization analyzer B 50  receives the music list information, the synchronized video list information, the relevant information, and the CD information. The synchronization analyzer B 50  specifies, at the head, a playback position for the CD information. Simultaneously with having received buffering start information transmitted by the terminal receiver B 41 , the synchronization analyzer B 50  requests a pause such that received synchronized video information is not transmitted to the display screen device B 48 . The synchronization analyzer B 50  receives the buffering end information and the synchronized video information; resets a pause for the synchronized video information such that the synchronized video information is synchronized with the CD information; transmits the synchronized video information to the display screen device B 48 ; and transmits the CD information to the performance device B 49 . Consequently, the display screen device B 49  and the performance B 49  synchronously display and play a video, music, and sound. The synchronization analyzer B 50  transmits the music list information to the music information screen device B 45  and the synchronized video list information and the relevant list information to the video information screen device B 46 . The music information screen device B 45  receives the music list information and displays an at-a-glance list based on the music list information. The video information screen device B 46  receives the synchronized video list information and the relevant list information and displays an at-a-glance list which is based on the synchronized list information and the relevant list information. Further, the synchronization analyzer B 50  transmits the thus-received relevant video information to the display screen device B 48  and the received relevant sound information to the performance device B 49 . As a result, the user can view information about activities of an artist and information, a video of an artist, an advertisement, information released by the public organization, or the like. Even after completion of the music and sound desired by the user, a video pertaining to activities of an artist, an advertisement video, or advertisement sound may be displayed on, played by, and output by the display screen device B 48  and the performance device B 49 .  
     [0068] When the user has selected desired music from the music information screen device B 45  and a desired video from the video information screen device B 46  through use of the terminal input device B 43 , the terminal input device B 43  transmits the result of selection performed by the user as the input information B to the synchronization analyzer B 50 . The synchronization analyzer B 50  transmits the input information B to the terminal transmitter B 51 . The terminal transmitter B 51  transmits the input information B to the server receiver B 61 . The server receiver B 61  transmits the received input information B to the information analyzer B 65 . When the user has selected synchronized video information associated with desired music and a desired video from the music information screen device B 45  and the video information screen device B 46 , synchronized video list information from the synchronized video information storage device B 63 , and the music list information from the music information storage device B 62 , through use of the terminal input device B 43 , the information analyzer B 65  prepares portions of the synchronization video list information and the music list information. The thus-prepared information is transmitted to the server transmitter B 66 . Further, the information analyzer B 65  selects relevant information which is associated with the predetermined synchronized video information, the synchronized video list information, the music information, and the music list information, and the thus-selected information is transmitted to the server transmitter B 66 . The server transmitter B 66  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and transmits the thus-received information to the terminal receiver B 41 .  
     [0069] The terminal receiver B 41  receives the music list information, the synchronized video list information, the synchronized video information, and the relevant information and sends the music list information, the synchronized video list information, and the relevant information to the synchronization analyzer B 50 . The terminal receiver B 41  transmits the buffering start time as buffering start information and a buffering end time as buffering end information to the synchronization analyzer B 50 . The synchronization analyzer B 50  receives the music list information, the synchronized video list information, the relevant information, and the CD information. The synchronization analyzer B 50  specifies, at the head, a playback position for the CD information. Simultaneously with having received buffering start information transmitted by the terminal receiver B 41 , the synchronization analyzer B 50  requests a pause for transmission of synchronized video information. The synchronization analyzer B 50  receives the buffering end information and the synchronized video information; resets a pause for the synchronized video information such that the synchronized video information is synchronized with the CD information; transmits the synchronized video information to the display screen device B 48 ; and transmits the CD information to the performance device B 49 . Consequently, the display screen device B 49  and the performance B 49  synchronously display and play a video, music, and sound. The synchronization analyzer B 50  transmits the music list information to the music information screen device B 45  and the synchronized video list information and the relevant list information to the video information screen device B 46 . The music information screen device B 45  receives the music list information and displays an at-a-glance list based on the music list information. The video information screen device B 46  receives the synchronized video list information and the relevant list information and displays an at-a-glance list which is based on the synchronized list information and the relevant list information. Further, the synchronization analyzer B 50  transmits the thus-received relevant video information to the display screen device B 48  and the received relevant sound information to the performance device B 49 . As a result, the user can view information about activities of an artist and information, a video of an artist, an advertisement, information released by the public organization, or the like. Even after completion of the music and sound desired by the user, a video pertaining to activities of an artist, an advertisement video, or advertisement sound may be displayed on, played by, and output by the display screen device B 48  and the performance device B 49 .  
     [0070] When the user desires to temporarily stop music and a synchronized video, the user selects a pause button of the operation device  47  by clicking the button through use of the terminal input device B 43 . The terminal input device B 43  transmits, to the synchronization analyzer B 50 , a result of selection performed by the user as the input information B. The synchronization analyzer B 50  receives the input information B and requests a pause for transmission of the synchronized video information and the CD information in a synchronized manner, thereby performing pause operation. When the user has selected a pause cancel button by means of clicking the button through use of the terminal input device B 43 , the terminal input device B 43  transmits a result of selection performed by the user to the synchronization analyzer B 50  as the input information B. The synchronization analyzer B 50  analyzes the input information B and cancels the pause for transmission of the synchronized video information and the CD information in a synchronized manner.  
     [0071] There will now be described a case where the user desires in-process playback of predetermined music of a CD after three minutes have lapsed since the music was started. The synchronization analyzer B 50  computes a time required to effect buffering from buffering start information and buffering end information. The thus-computed time required for buffering is taken as expected buffering information. The time required to effect buffering is dependent on the level of traffic over the Internet at different times and hence unstable. For this reason, a time at which buffering would surely be completed is set, and the thus-set time is added to the expected buffering information. Thus, a time at which buffering would surely be completed is taken as buffering information. Tests conducted by the inventor show that adding four to six seconds to the expected buffering information is desirable, to thereby create buffering information. The user specifies a time after three minutes since the predetermined music is started, through use of the terminal input device B 43 . The terminal input device B 43  takes a result of specification performed by the user as the input information B and transmits the input information B to the synchronization analyzer B 50 . The synchronization analyzer B 50  receives the input information B and requests a pause for transmission of CD information after three minutes have lapsed since predetermined music was started. The synchronization analyzer B 50  transmits in-process playback information to the terminal input device B 43  such that buffering is started at a time induced by subtracting a time—which is determined as a result of lapse of three minutes since the predetermined music for which the pause has been requested was started—from the time based on the buffering information. On the basis of the in-process playback information, the terminal input device B 43  performs buffering operation and sends synchronized video information to the synchronization analyzer B 50 . The synchronization analyzer B 50  cancels a pause for transmission of the synchronized video information and the CD information after lapse of three minutes since predetermined music was started. Buffering has already been completed by the buffering information after three minutes have lapsed since the predetermined music was started, and hence a synchronized video, music, and sound are synchronized with each other. Even during the course of in-process playback operation, the user can enjoy a video, music, and sound, all being synchronized with each other.  
     [0072] The user can also enjoy information and sound pertaining to activities of an artist displayed on the sub-screen  56  on the basis of the relevant information while enjoying a synchronized video on the main screen  55  of the display screen device B 48 . When a WEB page and a banner advertisement are displayed on the sub-screen  56  of the display screen device B 48 , a jump to another WEB page or the like can be readily performed by clicking the display screen device B 48  through use of the terminal input device B 43 , thus yielding great convenience.  
     [0073] [Sixth Embodiment] 
     [0074] An invention of claim 6 will now be described. The terminal C 7  is connected to the server B 6 , and the CD drive B 42  reads information from an inserted CD. These operations are the same as those in the case of the fifth embodiment in which the synchronization analyzer B is replaced with the synchronization analyzer C. Here, a method differing from that adopted in the fifth embodiment will now be described. The synchronization analyzer C 52  stores CD information into the CD information storage device  53 . In synchronism with transmission of the synchronized video information to the display screen device B 48 , the CD information is extracted from the CD information storage device  53 , and the thus-extracted CD information is transmitted to the performance device B 49 . In this way, the synchronization analyzer C 52  can achieve synchronization by either of two methods: that is, a method for achieving synchronization by issuing a pause for transmission of the synchronized video information to the display screen device B 48 , and a method for achieving synchronization by storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device. Variations arise in the speed at which the CD drive  42  reads the CD information, because of circumstances of an electrical system. Hence, either of the two methods enables realization of stability with enhanced accuracy. In the case of the method in which synchronization is achieved by issuing a pause for transmission of synchronized video information to the display screen device B 48 , the synchronization analyzer C 52  measures a time lag between the synchronized video and music. The time lag is sent to the stability determination device  54  as time lag information A. In the case of the method in which synchronization is achieved by storing CD information in the CD information storage device  53  and extracting the CD information from the CD information storage device  53 , a time lag between a synchronized video and music is measured and the time lag is sent to the stability determination device  54  as time lag information B.  
     [0075] The stability determination device  54  receives the time lag information A and the time lag information B, both being transmitted from the synchronization analyzer C 52 . The stability determination device  54  analyzes contents of the time lag information A and those of the time lag information B, thereby determining time lag information having a smaller value. For instance, when the time lag information A has a smaller value than that of the time lag information B, there is prepared stability information indicating selection of a method for achieving synchronization by issuing a pause for transmission of synchronized video information to the display screen device B 48 . In contrast, when the time lag information B has a value smaller than that of the time lag information A, there is prepared stability information indicating selection of a method for storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device  53 . The thus-prepared stability information is transmitted to the synchronization analyzer C 52 . The synchronization analyzer C 52  receives the stability information from the stability determination device  54  and analyzes contents of the stability information. When contents of the stability information indicate selection of a method for achieving synchronization by issuing a pause for transmission of the synchronized video information to the display screen device B 48 , the synchronization analyzer C 52  brings the synchronized video in synchronism with music by the method. Conversely, when contents of the stability information indicate selection of a method for achieving synchronization by storing CD information into the CD information storage device  53  and extracting the CD information from the CD information storage device  53 , the synchronization analyzer C 52  brings the synchronized video in synchronism with music by the method. Moreover, the synchronization analyzer C 52  can bring the synchronized video in step with music by combination of a method for achieving synchronization by issuing a pause for transmission of synchronized video information to the display screen device B 48 , such as extraction of CD information from the CD information storage device  53  when a pause for transmission of the synchronized video information to the display screen device B 48  is canceled and transmission of the CD information to the performance device B 49  in synchronism with cancellation of the pause; and a method for achieving synchronization by extracting the CD information from the CD information storage device  53 .  
     [0076] An advantage of the invention is to enable the user to view a highly-elaborate video synchronized with music and sound of a purchased CD and to provide the user with an everlasting-attractive video by alteration or addition of a video, thereby enabling the user to easily utilize a video again and again. The user can perform in-process playback or pause of a video and music, which are synchronized with each other. Further, in addition to a synchronized video, the user can readily select information about activities of an artist, an advertisement of an enterprise, and information offered by the public organization, thus yielding great convenience. An artist, such as a singer, can also efficiently report personal information to his/her fans. As a result of the user who has purchased a CD viewing a synchronized video again and again, opportunities where the user views an advertisement are increased, and hence the enterprise can efficiently provide an advertisement. The invention can also protect the copyright on music and that on a video synchronized with the music.