Browse Prior Art Database

MULTI-LINGUAL IDEOGRAPHIC CHARACTER PAGER IMPLEMENTATION

IP.com Disclosure Number: IPCOM000007473D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2002-Mar-29
Document File: 3 page(s) / 125K

Publishing Venue

Motorola

Related People

Ng Kam Pheng: AUTHOR [+2]

Abstract

Increased usage of pagers worldwide has resulted in many ideographic pagers being developed for mar- kets such as China, Korea and Vietnam. Generally, such pagers are developed independently for each market and substantial effort is required to modify existing ideographic pagers to suit a new market. At times, different languages have different character sizes which complicates it further. It would be more desirable ifa common pager software can be adapted to suit new market by simply changing values stored in the pager's EEPROM (Electrically Erasable Programmable Read Only Memory).

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0 M -A

Technical Developments

MULTI-LINGUAL IDEOGRAPHIC CHARACTER PAGER IMPLEMENTATION

by Ng Kam Pheng and Sajid Dalvi

  Increased usage of pagers worldwide has resulted in many ideographic pagers being developed for mar- kets such as China, Korea and Vietnam. Generally, such pagers are developed independently for each market and substantial effort is required to modify existing ideographic pagers to suit a new market. At times, different languages have different character sizes which complicates it further. It would be more desirable ifa common pager software can be adapted to suit new market by simply changing values stored in the pager's EEPROM (Electrically Erasable Programmable Read Only Memory).

  This method has been applied to one of the prod- ucts. By simply changing the pager's EEPROM val- ues, the pager is able to support the Chinese pager, the Korean pager and the Vietnamese pager. This

method can also be applied to other ideographic pagers which employ the same methodology used to decode the character bit patterns. An example could be the Indian pager.

  The language character table typically defines the locations of all characters in the language. This table is a standard which, is also used by other indus- tries such as the computer industry The table defines characters in blocks or sections. Characters are defined in a block by the row and column numbers. These characters are stored as hit patterns in the CGROM (Character Graphics Read Only Memory) in the pager. The mapping function basically con- verts the table address into the CGROM address and the pager will display the corresponding bit patterns.

2122 23------

I BIT

DETAILED BLOCK

7f -

CHARACTER TABLE

PATTERNS

CHARACTER X

CGROM

Fig. 1 Character Table to CGROM Mapping

  The pager's EEPROM stores information about this block; and a value called offset which is used to the different blocks or sections as illustrated in Fig- determine the physical location of the bit patterns ure 2. The following values are defined: start and in the CGROM.
end addresses of the block; the size of a character in

0 Motorola. 1°C. ,995 116 July 1995

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M-ROLA Technical Developments

CHARACTER TABLE TO CGRON LOCATION MAPPING

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