Data transmission device
AssigneeBrother Kogyo Kabushiki Kaisha and Xing, Inc.
InventorsKazunori Ikami, Yasuhiro Funahashi, Yukie Hasegawa
Life of this patent
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Abstract
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.
Claims13
A data transmission device comprising:
- a central control unit;
- and
- a plurality of terminals connected to the central control unit via a transmission line, the transmission line having several channels for transmitting information data,
- wherein the central control unit includes:
- information data memory means for storing a plurality of information data;
- and
- several data transmission means each for successively transmitting the plurality of information data via a corresponding channel of the transmission line cyclically at a predetermined cycle period, the transmission timings at which the several data transmission means transmit the information data being shifted from one another by a time period obtained by dividing the predetermined cycle period with the number of channels;
- and
- wherein each of the plurality of terminals includes:
- channel determination means for determining one channel of the several channels, over which a desired information data will be transmitted at a desired timing;
- and
- data pick up means for picking up the desired information data from the determined channel.
A data transmission device comprising:
- a central control unit;
- and
- a plurality of terminals connected to the central control unit via a transmission line, the transmission line having several channels for transmitting information data,
- wherein the central control unit includes:
- information data memory means for storing a plurality of information data, the plurality of information data being divided into several information data groups, each of the information data groups consisting of several information data;
- and
- several data transmission means each for successively transmitting the several information data of a corresponding information data group via a corresponding channel of the transmission line cyclically;
- and
- wherein each of the plurality of terminals includes:
- channel determination means for determining one channel of the several channels, over which a desired information data will be transmitted;
- and
- data pick up means for picking up the desired information data from the determined channel.
Dependencies are inferred from the claim text.