Low-Complexity Order-64 Integer Cosine Transform Design and its Application in HEVC
| Autor: | Zhe Chen, Wai-Kuen Cham, Qinglong Han |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Average bitrate Integer cosine transform Computer science Quantization (signal processing) 02 engineering and technology Low complexity 020901 industrial engineering & automation 0202 electrical engineering electronic engineering information engineering Media Technology Discrete cosine transform 020201 artificial intelligence & image processing Electrical and Electronic Engineering Arithmetic Transform coding |
| Zdroj: | IEEE Transactions on Circuits and Systems for Video Technology. 28:2407-2412 |
| ISSN: | 1558-2205 1051-8215 |
| Popis: | In high efficiency video coding (HEVC) standard, residuals are partitioned into variable-size transform units, and integer cosine transforms (ICTs) of order-4, 8, 16, and 32 are adopted to optimize the coding performance. Order-64 ICT is not used due to its high complexity and limited gain in general coding applications. This paper proposes a set of low-complexity ICTs (LCICTs), from order-8 to order-64, which have fully factorizable structures. LCICTs achieve similar coding performance as the state-of-art methods on HEVC Test Model 13 while requiring lower complexity, e.g., 71% fewer multiplications than the partially factorizable ICTs in the order-64 case. Moreover, we find that order-64 ICTs achieve around 1% average bitrate reduction at high quantization parameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|