JP3893171B2 - Terminal device and data transmission system provided with the terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data transmission system comprising a terminal device that executes predetermined data processing based on data transmitted from a central control device via a transmission line, and a central control device that transmits data to the terminal device. It is about.
[0002]
[Prior art]
Conventionally, for example, a karaoke system using a cable television (CATV) system, a center (central control device) and a plurality of terminal devices are connected via a transmission line, and various data are transmitted from the center toward the terminal device side. There is known a so-called one-way flow-type data transmission system that sequentially transmits (for example, karaoke performance data, character image service data, etc.). In such a data transmission system, each terminal device does not have to have a large storage device for storing data such as karaoke software or movie software in advance, so that the configuration of the terminal device becomes very simple. There are advantages such as.
[0003]
[Problems to be solved by the invention]
However, the conventional one-way flow-type data transmission system has the following problems when it is desired to acquire certain data. Here, in order to facilitate understanding of the problem, a group of music data is repeatedly transmitted from the center sequentially, and the terminal device monitors the music data transmitted through the transmission path and receives it when desired data arrives. Consider a system that acquires.
[0004]
If there are a total of K pieces of music data that are sequentially and repeatedly transmitted from the center, in the worst case, the desired data cannot be obtained unless K pieces of data are waited. For example, when about 5000 songs are transmitted, it is good if the desired song arrives in good timing or soon when access is started, but access is started immediately after the desired song has passed. In this case, since it is not possible to obtain it without waiting for nearly 5,000 songs, the waiting time becomes longer, which is inconvenient when urgently desired.
[0005]
From the point of view of urgently acquiring data, a request-type data transmission device is better, but in that case, a transmission system capable of bidirectional transmission must be constructed, which complicates the system or control processing. In addition, since another control process (for example, control related to traffic management) considering various inconveniences such as inability to communicate due to concentration of requests becomes necessary, the advantage of the one-way drift method remains, There is a need to be able to acquire data faster.
[0006]
Accordingly, the present invention has been made to solve the above-described problems, and a terminal device capable of efficiently acquiring data as a whole, and a terminal device thereof, on the premise of so-called unidirectional drifting data transmission. An object is to provide a data transmission system provided.
[0007]
[Means for Solving the Problems and Effects of the Invention]
In order to achieve the above object, the invention according to claim 1 is connected to a central control device that cyclically transmits a plurality of data in a predetermined order via a transmission line, and is transmitted from the central control device. In a terminal device capable of acquiring data, request storage means for storing up to a predetermined number of requests received by the request reception means, and data corresponding to the requests stored in the request storage means In the case where an unacquired one has been transmitted on the transmission line, the data acquisition means for acquiring the data in preference to the data that can be acquired at an early stage irrespective of the reception order of the requests, and the data acquisition Data storage means for storing data acquired by the means, and predetermined data processing based on the data stored in the data storage means. A terminal device, characterized in that it has a data processing unit capable.
[0008]
The terminal device of the present invention is connected to a central control device that cyclically transmits a plurality of data in a predetermined order through a transmission line, and acquires data transmitted from the central control device. There are features. That is, the terminal device stores the received requests up to a predetermined number based on the order of reception, and data corresponding to the stored requests that has not been acquired has been transmitted on the transmission path. In this case, data is acquired with priority from data that can be acquired early, regardless of the order in which requests are received. Based on the acquired data, the data processing means executes predetermined data processing.
[0009]
According to the order in which the requests are received, for example, if the data corresponding to the second request can only be acquired after acquiring the data corresponding to the first request, the access is started as pointed out as a problem in the prior art. If the data corresponding to the first request arrives at the right time or soon, it is good, but if access starts immediately after the data corresponding to the first request passes, If it does not wait until the data corresponding to the first request transmitted to the click comes again, it cannot be acquired, and the waiting time becomes longer. However, until the data corresponding to the first request is sent again, depending on the lower order of receiving requests, such as data corresponding to the second request or data corresponding to the third request The data will be coming. For this reason, in the present invention, when data that has not yet been acquired has been transmitted on the transmission line, priority is given to the data that can be acquired early regardless of the order in which the requests are received. To get to.
[0010]
In this way, efficient data acquisition as a whole can be realized while assuming data transmission of a so-called unidirectional flow method. Note that, even if the data acquisition order is independent of the request reception order, the predetermined data processing by the data processing means is preferably executed basically in accordance with the request reception order.
[0011]
In addition , In addition to the request received by the quest accepting means, the data acquisition means includes a specified identification information storage means for storing a predetermined number of pieces of identification information of data designated in advance, and the data acquisition means is a request stored in the request storage means. Or the data corresponding to the identification information stored in the designated identification information storage means and the unacquired data is transmitted on the transmission path, the request reception order or the designation identification information storage Regardless of the storage order of the identification information stored in the means, data that can be acquired early may be preferentially acquired.
[0012]
Here, “data that is designated in advance to be acquired in addition to the request received by the request receiving means” means data that is likely to be executed by the data processing means, for example, It seems to be data. Specific examples include new music data when applied to karaoke, song data at the top of the request ranking, and the like. In other words, in this proposal, in addition to the data according to the request, this specified data is also acquired. However, if the specified data is new music data or song data with higher request ranking, it is acquired in advance and stored in the terminal device. By doing so, when those songs are requested, it is possible to respond immediately. This is based on the premise that a predetermined number of songs that are likely to be used frequently are stored in the terminal device, and the songs are also acquired appropriately.
[0013]
In addition, when acquiring not only the request correspondence data but also the above specified data, next It is possible to devise such a method. In other words, the data acquisition unit prioritizes data that can be acquired at an early stage regardless of the order in which requests are received, even if there is data that has not yet been acquired, corresponding to the request stored in the request storage unit. The data corresponding to the identification information stored in the specified identification information storage means and not acquired is identified only when there is no data corresponding to the request that has not yet been acquired. Regardless of the storage order of information, data is acquired with priority from data that can be acquired early.
[0014]
This is because it is basically assumed that the request-corresponding data is acquired after the request is made and then data processing by the data processing means is performed. Therefore, it is not preferable to delay by other factors. . On the other hand, the specified data is not required immediately, and can be acquired in a situation where no other disadvantage is given. Therefore, if this specified data is acquired only when there is no data that has not been acquired yet, it does not affect the acquisition of request corresponding data or subsequent processing.
[0015]
Various kinds of data transmitted in this way are conceivable, and as one of representative examples, the claims 2 As shown in Fig. 4, there is karaoke performance data. In this case, the data processing means executes a predetermined karaoke performance process based on the karaoke performance data.
[0016]
Meanwhile, claims 3 The invention described in 1) includes a central control device including data storage means for storing a plurality of data and data transmission means for cyclically transmitting a series of data groups stored in the data storage means in a predetermined order; A data transmission system in which a plurality of terminal devices according to any one of claims 1 to 4 are connected via a transmission line, and data can be transmitted from the central control device to the terminal devices.
[0017]
In this case, the data transmission unit of the central control unit cyclically transmits a series of data groups stored in the data storage unit in a predetermined order, so that the series of data groups is transmitted via the transmission line to the terminal device side. Will be sent to. Since the operation in the terminal device or the effect thereof has been described above, it will not be repeated here.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, an application example to a karaoke system 1 configured by connecting a center 3 as a central control device and a large number of karaoke terminal devices 5 as terminal devices via transmission lines will be described. Here, FIG. 1 is a block diagram showing a schematic configuration of the entire karaoke system 1 and the configuration of the center 3, and FIG. 2 is a block diagram showing a configuration of the karaoke terminal device 5.
[0019]
As shown in FIG. 1, the karaoke system 1 includes a center 3 and a plurality of karaoke terminal devices 5 connected by a coaxial cable 7 that is a transmission path. Here, the karaoke terminal device 5 may be provided separately in separate buildings, or may be provided for each store or box in one building.
[0020]
Next, the configuration of the center 3 will be described with reference to FIG. The center 3 includes a polling control unit 11, a polling modem 13, a data transmission control unit 15, a data transmission modem 17, a storage device 19 storing song data, background video output devices (VDP) 21a and 21b, A BS (satellite broadcast) receiving system 23 and a head end 25 are provided.
[0021]
The polling control unit 11 includes a known CPU, ROM, RAM (not shown) and the like, and is connected to the polling modem 13 via an input / output interface (I / O) 27. The polling modem 13 modulates the polling signal output from the polling control unit 11 into a high frequency signal of a predetermined channel (that is, a predetermined frequency band), and outputs the modulated signal to the head end 25 to be transmitted to the karaoke terminal device 5. To do. The polling modem 13 receives and demodulates the response signal transmitted from the karaoke terminal device 5.
[0022]
Similar to the polling control unit 11, the data transmission control unit 15 includes a CPU, a ROM, a RAM (not shown), and the like, and via the bus line 29, an input / output interface 31, a storage device as “data storage unit” 19, connected to the background image output devices 21a and 21b. The data transmission control unit 15 is connected to the above-described polling control unit 11 via the input / output interfaces 27 and 31 and the transmission line 33, and can transfer data to each other.
[0023]
The data transmission modem 17 modulates the song data read from the storage device 19 into a high frequency signal of a channel different from the transmission channel of the above-mentioned polling signal, and outputs the modulated song data signal to the head end 25 for karaoke. It transmits to the terminal device 5. The data transmission control unit 15 and the data transmission modem 17 constitute a “data transmission unit”.
[0024]
The storage device 19 uses a large-capacity storage device such as a hard disk or a magneto-optical disk, and stores music data of about several thousand songs. The music data for one music is composed of a synchronization signal, music ID data indicating the music number, performance data, data indicating the end (separation) of data for one music, and the like. The performance data includes MIDI standard data that is accompaniment music data, and lyrics data that is displayed on the monitor television of the karaoke terminal device 5 described later.
[0025]
The background image output devices (video disc players) 21a and 21b output background image information displayed on the monitor television of the karaoke terminal device 5 described later. For example, one output device 21a has an image for enka and the other. In the output device 21b, the images are classified according to the taste (genre) of the requested song, such as images for pops. Each of the background image output devices 21a and 21b is connected to a modulator 35, and image data (standard NTSC (National Television System Committee) video signal) varies depending on the modulator 35. And is output to the head end 25.
[0026]
The BS receiving system 23 includes a receiving antenna 36, a BS tuner 37, and a modulator 39, and the modulator 39 is connected to the head end 25. The head end 25 is provided with various devices (not shown) such as a mixer for sending a signal to the coaxial cable 7. The head end 25 includes a polling signal from the polling modem 13, a music data signal from the data transmission modem 17, a background image signal from the background image output devices 21 a and 21 b, and a BS broadcast signal from the BS receiving system 23. Is input, a plurality of signals having different channels are multiplexed, output to the coaxial cable 7, and transmitted to each karaoke terminal device 5.
[0027]
Then, the structure of the karaoke terminal device 5 is demonstrated based on FIG. The karaoke terminal device 5 receives signals from a control unit 41 that performs overall control, an input device 43, a sound source 45, an amplifier 47, a speaker 49, a video composition circuit 51, a monitor television 53, and the center 3. A terminal modem 57 and a video tuner 59 for receiving and processing are provided.
[0028]
The control unit 41 controls the entire karaoke terminal device 5, and includes a CPU 61, a ROM 63, a RAM 65, and the like, and via a bus line 67, an input device 43, a sound source 45, an input / output interface 69, a video synthesis circuit. 51 and the like. In the RAM 65, a request / new score table 65a and a music data memory 65b are set.
[0029]
In the request / new music table 65a, as shown in FIG. 3, tables for setting song IDs and acquired flags are prepared for ten songs in this embodiment. Numbers 1 to 5 are areas for requested songs, and numbers 6 to 10 are set as areas for new music. The acquired flag is “1” when the corresponding music data is acquired from the music data group transmitted from the center 3 by the process described later, and is “0” in the unacquired state. The request area of the request / new score table 65a corresponds to “request storage means”, and the new score area corresponds to “designated identification information storage means”.
[0030]
On the other hand, the song data memory 65b corresponds to “data storage means” and is a memory for storing the song data corresponding to the song ID stored in the request / new score table 65a. Yes, as shown in FIG. 4, a storage area (RA) for request correspondence data and a storage area (NA) for new musical piece correspondence data are prepared.
[0031]
The input device 43 is provided with various switches for the user to operate the karaoke terminal device 5, and selects a numeric keypad for inputting the song number of the requested song, whether to perform karaoke or watch BS broadcast, and the like. Various mode switches (not shown) are provided. The input device 43, the control unit 41, and the like constitute a “request accepting unit”.
[0032]
The sound source (synthesizer sound source) 45 converts MIDI data included in song data into a karaoke accompaniment audio signal, and this audio signal is input to an amplifier 47. The amplifier 47 mixes and amplifies the karaoke accompaniment audio signal and the singing audio signal from the microphone 71 by the singer, and outputs it to the speaker 49. The sound source 45, the amplifier 47, the speaker 49, the control unit 41, and the like constitute “data processing means”.
[0033]
The video synthesizing circuit 51 converts the lyric data included in the song data into a lyric video signal, synthesizes it with the background image signal input from the video tuner 59, and outputs it to the monitor television 53. . The terminal modem 57 receives and demodulates a polling signal and music data signal transmitted from the center 3 via the coaxial cable 7, modulates a response signal output from the control unit 41, and transmits it to the center 3. To do. Here, the response signal is a signal for returning to the center 3 in response to a polling signal transmitted from the center 3. The terminal modem 57, the control unit 41, and the like constitute a “data acquisition unit”.
[0034]
The video tuner 59 receives a background image signal transmitted from the center 3 and a BS broadcast signal from the BS receiving system, and selects a channel to obtain a desired video signal. Then, operation | movement of the karaoke system 1 of this embodiment of the structure mentioned above is demonstrated.
[0035]
First, the operation on the center 3 side will be described. When music data is transmitted from the center 3 side, the data transmission control unit 15 performs a certain period of time (a time set as an allowable time until the user requests a music and starts playing). The music data stored in the storage device 19 is transmitted to the karaoke terminal device 5 via the coaxial cable 7 by a predetermined channel. In this case, the music data is cyclically transmitted in a predetermined order. In other words, when transmitting music pieces with music IDs 1 to 5000, the data transmission control unit 15 sends the music data group to the data transmission modem 17 via the input / output interface 31, and the head end 25 and The data is sequentially transmitted to the karaoke terminal device 5 via the coaxial cable 7. Then, when transmission of all 5000 songs is completed, the song ID is transmitted again sequentially from the song data having the first number.
[0036]
Then, operation | movement of each karaoke terminal device 5 is demonstrated. FIG. 5 is a flowchart showing a request reception process, FIG. 6 is a song data acquisition process, and FIG. 7 is a flowchart showing a song performance process. These processes are executed in parallel by so-called multitasking.
[0037]
In the request reception process (FIG. 5), first, in the first step S110, it is determined whether or not there is an empty space in the request area (see FIG. 3) of the request / new score table 65a. Then, if there is a vacancy (S110: YES), the process proceeds to S120, and it is determined whether or not the song number of the requested song has been input from the input device 43. If a song number has been input (S120: YES), the process proceeds to S130, where it is newly registered in the request area of the request / new score table 65a, and then the process returns to S110.
[0038]
Next, the music data acquisition process (FIG. 6) will be described. In the first step S10, it is determined whether there is an unacquired song in the request / new score table 65a (FIG. 3). This can be determined by whether or not there is a song whose acquired flag remains “0”. If there is no unacquired music, this process is temporarily terminated, but if there is an unacquired music (S10: YES), the process proceeds to S20.
[0039]
In S20, the song ID whose acquired flag remains “0” in the request / new score table 65a (FIG. 3) and the song data that is sequentially transmitted from the center 3 through a predetermined channel of the coaxial cable 7 Are compared with each other, and it is determined whether or not they match in the subsequent S30. The process of S20 is repeated until they match, and if they match (S30: YES), the process proceeds to S40.
[0040]
In S <b> 40, music data having the same music ID is acquired and stored in the music data memory 65 b of the RAM 65. When the acquisition / storage in S40 is completed (S50: YES), the process proceeds to S60, and the acquired flag in the request / new score table 65a in FIG. 3 is set to “1”. Thereafter, the process returns to S10 and it is determined whether or not there is an unacquired song.
[0041]
Note that the song data acquired in this song data acquisition process is not only the song ID stored in the request area in the request / new score table 65a of FIG. 3, but also the song ID stored in the new score area. Are also included. The song ID stored in the new music area is manually set in advance by the administrator of the karaoke terminal device 5 or the like, or the karaoke terminal device 5 itself is automatically updated and set every predetermined period. It will be. Therefore, in S10 of FIG. 6, it is determined whether there is an unacquired song regardless of the request area and the new music area. Of course, in S40, the music corresponding to the music ID set in the new music area. Data may be acquired and stored, and the same applies to S60.
[0042]
Next, the music performance process (FIG. 7) will be described. First, in the first step S210, the song ID stored at the head of the request area in the request / new score table 65a of FIG. 3 is extracted. In S220, it is determined whether or not the song data corresponding to the song ID is in the storage area (NA) of the new music corresponding data in the song data memory 65b of FIG. 4, and if it is in the storage area (NA). (S220: YES), the process proceeds to S240 and the corresponding music data is extracted and played. On the other hand, if it is not in the storage area (NA) of the new music corresponding data (S220: NO), the process proceeds to S230 to determine whether it is in the storage area (RA) of the request corresponding data, and the storage area (RA). If it is within (S230: YES), the process proceeds to S240.
[0043]
If the determination is negative in S230, the process returns to S220. That is, it waits until it is stored in one of the two storage areas (NA) and (RA) of the music data memory 65b shown in FIG. The music data acquisition process of FIG. 6 described above is processed in parallel with the music performance process of FIG. 7. Therefore, when music data is acquired and stored in S40 of FIG. 6, S220 or S230 of FIG. May be affirmed. The reason is that there is a possibility that the song data corresponding to the song ID extracted in S210 is not necessarily acquired in S40 of FIG.
[0044]
The performance process in S240 will be briefly described. Of the extracted music data, the lyric data is input to the video composition circuit 51 and converted into a lyric video signal. In addition, a background image signal whose channel is selected by the video tuner 59 is also input to the video composition circuit 51. Then, the background image information and the lyric video signal are synthesized (superimposed) by the video synthesizing circuit 51, and the lyrics character string is superimposed on the background image and displayed on the monitor television 53. On the other hand, the MIDI data included in the extracted music data is converted into an accompaniment audio signal by the sound source 45 and input to the amplifier 47. This accompaniment audio signal is mixed with the singing audio signal from the microphone 71 by the singer, amplified as appropriate, and output from the speaker 49. As a result, the user can enjoy karaoke.
[0045]
After S240, it is determined in S250 whether or not the performance is finished. If the performance is finished (S250: YES), the process proceeds to S260 and the request area in the request / new score table 65a in FIG. Update. In other words, the data for the requested music piece that has been played, that is, the data at the head is deleted, and the subsequent data is moved up one by one. Thus, if the first request is processed in the next processing of S210, a performance according to the request order is realized.
[0046]
Further, after the update process in S260, the process proceeds to S270. In S270, if the song data played in S240 is in the request corresponding data storage area (RA) of the song data memory 65b (FIG. 4), the song data is deleted. This is because the request-corresponding data storage area (RA) stores only the song data corresponding to the request and not being played at that time. In other words, if there is unnecessary music data, if there is a new request after that, the music data corresponding to the request cannot be stored, so the music data that has been played is deleted.
[0047]
As described above in detail, in the karaoke system 1 of the present embodiment, a predetermined song data group is sequentially and cyclically transmitted from the center 3 side to the karaoke terminal device 5 side. If the received requests are stored up to a predetermined number based on the order of reception, and unacquired data corresponding to the stored requests are transmitted on the coaxial cable 7, Regardless of the reception order, the data that can be acquired early is prioritized.
[0048]
According to the order in which the requests are received, for example, if the data corresponding to the second request can only be acquired after acquiring the data corresponding to the first request, the access is started as pointed out as a problem in the prior art. If the data corresponding to the first request arrives at the right time or soon, it is good, but if access starts immediately after the data corresponding to the first request passes, If it does not wait until the data corresponding to the first request transmitted to the click comes again, it cannot be acquired, and the waiting time becomes longer. However, until the data corresponding to the first request is sent again, depending on the lower order of receiving requests, such as data corresponding to the second request or data corresponding to the third request The data will be coming. Therefore, in the karaoke terminal device 5 of the present embodiment, when data that corresponds to a request and has not been acquired is transmitted on the coaxial cable 7, “early” Priority is given to data that can be acquired.
[0049]
In this way, efficient data acquisition as a whole can be realized while assuming data transmission of a so-called unidirectional flow method. In the present embodiment, the song data of a new musical piece is acquired as “data specified in advance to be acquired in addition to the request”. This is data that is likely to be used for karaoke performance. By acquiring this data in advance and storing it in the song data memory 65b, if these songs are requested, they are instantly received. It becomes possible to cope with. This is based on the premise that a predetermined number of songs that are likely to be used frequently are stored in the terminal device, and the songs are also acquired appropriately. In addition, although the music data of the new musical piece music was mentioned as a specific example, the music data etc. of a request ranking high rank other than that are mentioned.
[0050]
Although the embodiment has been described above, the present invention is not limited to the above embodiment, and can be implemented in various modes. For example, in the case of the above embodiment, if there is an unacquired song ID stored in the request / new score table 65a shown in FIG. Although it acquired from what can be acquired at an early stage, you may devise as follows. In other words, in the case of a request-compatible song, regardless of the order in which the requests are received, priority is acquired from song data that can be acquired early. It is acquired only when there is not. In the case of a request-corresponding song, since it is assumed that the song data is acquired after the request is made and then the karaoke performance is promptly performed, it is not preferable to delay due to other factors. On the other hand, the song data of the new musical piece is not necessary immediately, and can be obtained in a situation where no other disadvantage is given. Therefore, if only the song data corresponding to the request and there is no unacquired data, if the song data of the new song is acquired, the acquisition of the song data of the request-corresponding song or the subsequent karaoke performance processing etc. There is no impact.
[0051]
Moreover, in the said embodiment, although the tune data used for a karaoke performance with the karaoke terminal device 5 was taken as an example as data, other various things can be considered. For example, normal song data that is not karaoke may be used, or data for character image services may be used.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an entire karaoke system of the present embodiment and a configuration of a center.
FIG. 2 is a block diagram showing a configuration of a karaoke terminal device of the present embodiment.
FIG. 3 is an explanatory diagram showing a request / new music score table in the RAM of the karaoke terminal device;
FIG. 4 is an explanatory diagram showing a song data memory in the RAM of the karaoke terminal device.
FIG. 5 is a flowchart showing a request reception process in the karaoke terminal apparatus.
FIG. 6 is a flowchart showing song data acquisition processing in the karaoke terminal device.
FIG. 7 is a flowchart showing music performance processing in the karaoke terminal apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Karaoke system 3 ... Center 5 ... Karaoke terminal device 7 ... Coaxial cable 15 ... Data transmission control part 17 ... Data transmission modem 19 ... Memory | storage device 25 ... Head end 35 ... Modulator 36 ... Antenna 41 ... Control part 43 ... Input device 45 ... Sound source 47 ... Amplifier 49 ... Speaker 51 ... Video composition circuit 53 ... Monitor TV 59 ... Video tuner 61 ... CPU 65 ... RAM 65a ... Request / new score table 65b ... Music data memory

Claims (3)

In a terminal device that is connected by a transmission path with a central control device that cyclically transmits a plurality of data in a predetermined order, and that can acquire data transmitted from the central control device,
Request storage means for storing requests received by the request receiving means up to a predetermined number based on the order of reception;
Data that can be acquired at an early stage regardless of the order in which the requests are received when data that corresponds to the request stored in the request storage means and that has not been acquired has been transmitted on the transmission path. Data acquisition means for acquiring priority from,
Data storage means for storing data acquired by the data acquisition means;
Data processing means capable of performing predetermined data processing based on data stored in the data storage means ;
Designated identification information storage means for storing identification information of data designated in advance to be acquired in addition to the request received by the request reception means;
Equipped with a,
The data acquisition means is data corresponding to a request stored in the request storage means or data corresponding to identification information stored in the designated identification information storage means, and an unacquired one is transmitted on the transmission path. If it has been transmitted, regardless of the order in which the requests are received or the storage order of the identification information stored in the designated identification information storage means, it is acquired preferentially from data that can be acquired early, If there is an unacquired data corresponding to the request stored in the request storage means, regardless of the acceptance order of the request, it is obtained preferentially from the data that can be obtained early, The identification information stored in the designated identification information storage means only when there is no unacquired data corresponding to the request Corresponding to a data that not acquired, regardless of the storage order of the identification information, the terminal apparatus characterized by being configured to obtain preferentially from early data that can be retrieved   The terminal device according to claim 1, wherein the data is karaoke performance data, and the data processing means is configured to be able to perform predetermined karaoke performance processing based on karaoke performance data.   A central control device comprising data storage means for storing a plurality of data and data transmission means for cyclically transmitting a series of data groups stored in the data storage means in a predetermined order; and A data transmission system in which a plurality of terminal devices according to Item 2 are connected via a transmission path and data can be transmitted from the central control device to the terminal device.

Images