Data coding system and decoding circuit of compressed code

Details Data coding system and decoding circuit of compressed code Data coding system and decoding circuit of compressed code

1996-05-23

1999-11-30

Fetting, Anton

Computer graphics processing and selective visual display system

Computer graphics processing

Character generating

H03M 740

Patent

active

059951184

ABSTRACT:
A data coding system is arranged such that character font data is compressed in a unit of 4-bit in a form of a bit string with a compression width of 4-bit in the Huffman coding system. The data coding system employs a code structure in the Huffman coding system for respectively converting three bit strings selected in order from that of the highest appearance frequency in a unit of 4-bit in the character font data into the compressed codes expressed using not more than 3 bits. The described system permits a significantly improved compression rate of the character font data into respective compressed codes.

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Ong et al., An Efficient Data Compression Scheme Based on Semi-Adaptive Huffman Coding for Moderately Large Chinese Text Files, IEEE Singapore Intl Conf on Networks & Intl Conf on Information Engineering, pp. 332-336 Jul. 1995.
Ong et al., Compressing Chinese Text Files Using an Adaptive Huffman Coding Scheme and a Static Dictionary of Character Pairs, IEEE Singapore Intl Conf on Networks & Intl Conf on Information Engineering, Sep. 1993.
M. Nagao, "Data Compression of Chinese Character Patterns", Proceedings of the IEEE, vol. 68 , No. 7, Jul. 1980, pp. 818-829, USA.

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