Steerable-Discrete-Cosine-Transform (SDCT): Hardware Implementation and Performance Analysis

Abstract

In the last years, the need for new efficient video compression methods grown rapidly as frame resolution has increased dramatically. The Joint Collaborative Team on Video Coding (JCT-VC) effort produced in 2013 the H.265/High Efficiency Video Coding (HEVC) standard, which represents the state of the art in video coding standards. Nevertheless, in the last years, new algorithms and techniques to improve coding efficiency have been proposed. One promising approach relies on embedding direction capabilities into the transform stage. Recently, the Steerable Discrete Cosine Transform (SDCT) has been proposed to exploit directional DCT using a basis having different orientation angles. The SDCT leads to a sparser representation, which translates to improved coding efficiency. Preliminary results show that the SDCT can be embedded into the HEVC standard, providing better compression ratios. This paper presents a hardware architecture for the SDCT, which is able to work at a frequency of 188 M Hz , reaching a throughput of 3.00 GSample/s. In particular, this architecture supports 8k UltraHigh Definition (UHD) (7680 × 4320) with a frame rate of 60 Hz , which is one of the best resolutions supported by HEVC.

Low-Complexity Multiple Transform Selection Combining Multi-Type Tree Partition Algorithm for Versatile Video Coding

“…Transform is one of the most important modules in the video-coding model, since the predicted residual blocks need to be transformed in all frames for subsequent quantization and entropy coding processes. On the basis of obtaining different orientation angles, the Steerable Discrete Cosine Transform (SDCT) [ 23 ] is proposed in HEVC to exploit the directional Discrete Cosine Transform (DCT). To further enhance the coding efficiency, the Multiple Transform Selection (MTS) [ 24 ] was proposed in the VVC, allowing for the encoder to select a pair of horizontal and vertical transforms from a predefined set.…”

Recent Trends on Applications of Electronics Pervading the Industry, Environment and Society

“…The Special Issue is characterized by 13 original research papers [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ] that we briefly introduce in the following.…”

“…The tenth paper [ 10 ] is entitled “Steerable-Discrete-Cosine-Transform (SDCT): Hardware Implementation and Performance Analysis” and is from R. Peloso et al, a group of authors from Politecnico di Torino.…”