A Study on the Block Truncation Coding Using the Bit-plane Reduction

비트평면 감축을 이용한 블록 절단부호화에 관한 연구

  • 이형호 (삼성종합기술원 정보시스템 연구소) ;
  • 박래홍 (서강대학교 전자공학과)
  • Published : 1987.05.01

Abstract

A new Block Truncation Coding(BTC) technique reducing the bit-plane and using differential pulse code modulation (DPCM) is proposed and compared with the conventional BTC methods. A new technique decides whether the subblock can be approximated to be uniform or not. If the subblock can be approximated to be uniform(merge mode), we transmit only the gray-level informantion. It not (split mode), we transmity both the bit-plane and the gray-level information. DPCM method is proposed to the encoding of gray-level information when the subblock can be approximated to be uniform. Also modified quantization method is presented to the encoding of gray-level information when the subblock is not uniform. This technique shows the results of coding 256 level images at the average data rate of about 0.75 bits/pel.

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