Zero coefficient-aware fast IQ-IDCT algorithm

Choi, Kiho; Lee, Ki Hoon; Kim, Eun Ji; Jang, Euee S

doi:10.1109/ICNIDC.2010.5657972

상세 보기

Zero coefficient-aware fast IQ-IDCT algorithm

Choi, Kiho;
Lee, Ki Hoon;
Kim, Eun Ji;
Jang, Euee S

Citations

SCOPUS

2

초록

In this paper, we propose a zero quantized DCT coefficients-aware algorithm for the implementation of fast inverse quantization (IQ) and inverse discrete cosine transform (IDCT). In our prior work [4], we showed that zero coefficient-ware IDCT algorithm for fast decoding. In this paper, we extended a zero-skipping IDCT (Z-IDCT) by incorporating IQ with Z-IDCT. By adaptively skipping zero quantized coefficient computations, the proposed method can significantly reduce the computation time of IQ and IDCT in decoder. The decoding time of IQ and IDCT using the proposed method showed 36.7 percent speedup on average compared to that of MPEG-4 simple profile, and it also showed 9.6 percent speedup on average compared to that of Z-IDCT with MPEG-4 simple profile.

키워드

Fast decoding; Inverse discrete cosine transform; Inverse quantization; Zero coefficient; Computation time; Fast decoding; Inverse discrete cosine transforms; Inverse quantization; Quantized coefficients; Quantized DCT coefficients; Simple profiles; Zero coefficient; Algorithms; Cosine transforms; Decoding; Motion Picture Experts Group standards; Discrete cosine transforms

제목: Zero coefficient-aware fast IQ-IDCT algorithm

저자: Choi, Kiho; Lee, Ki Hoon; Kim, Eun Ji; Jang, Euee S

DOI: 10.1109/ICNIDC.2010.5657972

발행일: 2010-12

유형: Conference Paper

저널명: Proceedings - 2010 2nd IEEE International Conference on Network Infrastructure and Digital Content, IC-NIDC 2010

페이지: 327 ~ 331