Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Reexamination Certificate
2000-09-18
2004-07-20
Barot, Bharat (Department: 2155)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
C709S203000, C709S217000, C709S219000
Reexamination Certificate
active
06766296
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a data conversion system, and relates, more particularly, to a data conversion system that is suitable for displaying contents provided by various character sets.
2. Description of Related Art
With the wide use of the Internet that is a collection of computer networks connected to each other throughout the world, it has become possible to easily browse or access to various kinds of contents of WWW (World Wide Web) on the Internet. The WWW is constructed by the contents hierarchically formed in Hyper Text structure on the Internet such that not only text data in reading documents and image data like still images and moving images but also sound data and the like are linked with other data. Such a reading document in the Hyper Text structure is provided as data described in a generalized description language such as HTML (HyperText Markup Language by a WWW server. Users can obtain access to the contents on the WWW servers distributed throughout the world via the Internet, by using browsing software called “browser”.
Since the contents are placed on each of WWW servers distributed throughout the world via the Internet, the contents are provided based on one or more character code (or character set) described as an information exchange code corresponding to the language of each country. For example, in Japan, various kinds of contents are generally provided using Roman (English alphabet) characters and Kana (Japanese alphabet) characters conforming to “JIS X0201” that is prescribed by Japan Industrial Standards (hereinafter to be abbreviated as JIS), Kanji (Chinese) characters conforming to “JIS X0208”, and other plural character sets such as Unicode (UNICODE), EUC (Extended UNIX Code), and JIS (Shifted-JIS; hereinafter to be abbreviated as S-JIS).
Because of different types of character sets, the contents provided in the EUC character set, for example, cannot be displayed correctly by a browser set with the S-JIS character set mounted on the terminal. This problem is particularly extreme in the case of the contents provided in a multi-byte code system, as compared with the character set of a 7-bit single byte code system.
Consider a network (here, the Internet) connecting a browser-installed terminal and a contents server that is capable of providing the contents to the terminal through the network. The browser-installed terminal can automatically recognize a character set of the contents and can display the contents on its display. In this case, the terminal is equipped with: a character set discriminator that automatically distinguishes between a plurality of character sets such as the Unicode, the EUC or the S-JIS: and a processor that processes the received contents based on a discriminated character set.
It is assumed that the contents are provided in the S-JIS character set. When the terminal has received the contents of the S-JIS from the server via the network, the character set discriminator automatically discriminates the character set, and the processor processes the contents on the discriminated character set so as to display it on the display.
Such a conventional data conversion system, the character set of the contents is automatically recognized on the browser at the terminal side, and the contents are set to the corresponding character set, thereby to correctly display the contents.
In recent years, based on the advancement of the integration technologies and mounting technologies, there have been developed portable information terminals as represented by a PDA (Personal Digital Assistant) equipped with a communication function, and a multifunctional portable telephone terminal. Thus, a provision of Internet services using these terminals has also been in high demand.
However, the processing capacity of these terminals is lower than that of the personal computers, and it is difficult to mount onto the portable information terminals a browser similar to that mounted on a terminal such as a personal computer. For example, in the case of a portable telephone terminal, there arises a problem that the amount of data that can be transferred is limited because of a narrow-band mobile communications network to which the portable telephone terminal is directly connected. In order to overcome this difficulty, there has been proposed a WAP (Wireless Application Protocol) system that makes it possible for the portable telephone terminals to obtain Internet information such as the contents on the WWW servers throughout the world.
In the WAP system, to cope with the narrow band of network and the shortage in the processing capacity of a terminal, the contents on the server are encoded or compiled to produce compressed contents data at the network side. Thereafter, the network provides the compressed contents data to the browsers at the client terminals.
As explained above, it is practically impossible to mount the portable information terminal or portable telephone terminal having a small processing capacity with browsers corresponding to various character sets that operate on a personal computer (PC) having a high processing capacity. Therefore, services of high quality cannot be provided to these portable information terminals and portable telephone terminals. Under this circumstance, only a limited number of character sets can be mounted on these portable information terminals and portable telephone terminals. Accordingly, it has not been possible to obtain a correct display of contents at terminals In the case where the contents are not supported by the mounted character sets.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a data conversion system and method that can minimize the processing load of character set conversion at a terminal side.
According to a first aspect of the present invention, a system includes a server storing predetermined data: a data requesting terminal for requesting the predetermined data from the server; and a network for connecting the server and the data requesting terminal. The data requesting terminal includes; a character code sender for sending a terminal-supported character code to the network when transmitting a data request to the network, wherein the terminal-supported character code is supported in the data requesting terminal. The network includes: a node for receiving the predetermined data from the server in response to the data request received from the data requesting terminal and, when a character code of the predetermined data is different from the terminal-supported character code, converting the character code of the predetermined data to the terminal-supported a character code before transmitting the predetermined data of the terminal-supported character code to the data requesting terminal.
According to a second aspect of the present Invention, the network includes: a character code server for storing a plurality of character code processing modules each corresponding to a plurality of character codes; and a node for receiving the predetermined data from the server in response to a data request received from the data requesting terminal and, when a character code of the predetermined data is different from the terminal-supported character code, receiving a module address of a character code processing module corresponding to the terminal-supported character code from the character code server to send a combination of the predetermined data and the module address to the data requesting terminal. The data requesting terminal includes: a character code sender for sending a terminal-supported character code to the network when transmitting the data request to the network, wherein the terminal-supported character code is supported in the data requesting terminal; a receiver for receiving a character code processing module corresponding to the terminal-supported character code from the character code server based on the module address received from the node; and a converter for converting the character co
Barot Bharat
Young & Thompson
LandOfFree
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