 System and method for programmable telephone subscriber line test |
| Generally, the present invention relates to a system and method for providing software-implemented, ... |
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| Monitoring for key words with SIV to validate home incarceration |
| What is claimed is: 1. A method comprising: for a designated person, generating service profile ... |
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| Personal data communication apparatus |
| Accordingly, the present invention is directed to a personal data communication apparatus that ... |
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| Conditional autodialer |
| What is claimed is: 1. A conditional autodialer adapted to selectively automatically dial a ... |
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| Radio apparatus |
| It is an object of the present invention to provide a radio apparatus which can be miniaturized and ... |
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| Image communication device and method for communication terminal |
| It is, therefore, an object of the present invention to provide a device and method for selectively ... |
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| Vending machine |
| Referring to FIG. 1, a network is shown, which includes vending machine 10 and accompanying ... |
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Data transmission device
| Details |
Inventors: Ikami, Kazunori; Funahashi, Yasuhiro; Hasegawa, Yukie;
Assignee: Brother Kogyo Kabushiki Kaisha and Xing, Inc. (Aichi-Ken, JP)
Primary Examiner: Kizou; Hassan
Assistant Examiner: Bnimoussa; A.
Attorney, Agent or Firm: Oliff & Berridge
Each of the data transmission devices 15a-15d serially and cyclically transmits all the song data over a corresponding channel, by a time cycle corresponding to the number of the song data. The four data transmission devices 15a-15d transmit the song data, at timings shifted from one another by (1/the number of channels) of the time cycle. Each terminal determines one channel out of the four channels that can most rapidly supply desired song data. Each terminal then picks up the desired song data from the determined channel. |
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DETAILED DESCRIPTION A one-way data transmission system is conceivable in which the center serially and cyclically transmits a plurality of information data to the terminals.
Each terminal monitors the incoming information data.
When desired information data arrives, the terminal picks up the information data.
Assume now that this one-way transmission system is applied to a karaoke system for supplying karaoke song data to a plurality of terminals.
The center repeatedly transmits a plurality of, for example 5,000 songs' worth of song data to the terminals, in succession.
At a terminal, a user requests a song he or she desires to sing.
When song data of the requested song arrives, the terminal picks up the song data and starts the karaoke performance accordingly.
According to this one-way transmission system, when the user requests a song immediately before the song data for the song arrives, the terminal can pick up that song data within a very short period of time.
However, when the user requests the song immediately after its song data has been transmitted, the terminal must wait for the next time the song data arrives after song data for all the other songs have been transmitted.
In this example, the terminal must wait until about song data for 5,000 songs have been transmitted, This long waiting time is inconvenient for the user.
A two-way transmission system is also conceivable, in which the terminal transmits a request to a center, whereupon the center transmits requested information data to the terminal.
According to this two-way transmission system, the terminal can obtain desired information data within a short period of time.
However, the structure of two-way transmission systems is more complicated and needs more troublesome control processes than the one-way transmission systems.
Additional control processes, such as traffic control processes, must be provided to prevent various defects inherent to the two-way transmission, for example, transmission error due to overflow of requests from terminals
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Ring Tones 
