TY - GEN
T1 - Block adaptive selection of multiple core transforms for video coding
AU - De-Luxán-Hernández, Santiago
AU - Marpe, Detlev
AU - Schwarz, Heiko
AU - Müller, Klaus Robert
AU - Wien, Mathias
AU - Ohm, Jens Rainer
AU - Wiegand, Thomas
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2017/4/19
Y1 - 2017/4/19
N2 - Transform coding tools in video coding have traditionally relied on the Discrete Cosine Transform Type II (DCT-II) to map residual signals to a new domain where quantization and entropy coding tools achieve a better coding efficiency than in the spatial domain. However, the DCT-II is not sufficient to model all different types of residual signals efficiently, especially in the intra-predicted blocks case. For this reason, the DST-VII was introduced in H.265/High Efficiency Video Coding (HEVC) in order to improve the compression performance of 4 × 4 intra-predicted blocks. In this paper we propose a multiple core transform approach, in which each transform is separable and generated by combining two one-dimensional transforms for the vertical and horizontal directions. The pair of 1-D transforms is selected from a set of three different types of Discrete Trigonometric Transforms and the Identity Transformation. Test results show that the proposed algorithm achieves bit rate reductions of 3% on average with respect to HEVC for intra-predicted residuals.
AB - Transform coding tools in video coding have traditionally relied on the Discrete Cosine Transform Type II (DCT-II) to map residual signals to a new domain where quantization and entropy coding tools achieve a better coding efficiency than in the spatial domain. However, the DCT-II is not sufficient to model all different types of residual signals efficiently, especially in the intra-predicted blocks case. For this reason, the DST-VII was introduced in H.265/High Efficiency Video Coding (HEVC) in order to improve the compression performance of 4 × 4 intra-predicted blocks. In this paper we propose a multiple core transform approach, in which each transform is separable and generated by combining two one-dimensional transforms for the vertical and horizontal directions. The pair of 1-D transforms is selected from a set of three different types of Discrete Trigonometric Transforms and the Identity Transformation. Test results show that the proposed algorithm achieves bit rate reductions of 3% on average with respect to HEVC for intra-predicted residuals.
KW - Discrete Trigonometric Transforms
KW - Intra Coding
KW - Multiple Transforms
KW - Separable Transforms
KW - Transform Coding
UR - http://www.scopus.com/inward/record.url?scp=85019497127&partnerID=8YFLogxK
U2 - 10.1109/PCS.2016.7906349
DO - 10.1109/PCS.2016.7906349
M3 - Conference contribution
AN - SCOPUS:85019497127
T3 - 2016 Picture Coding Symposium, PCS 2016
BT - 2016 Picture Coding Symposium, PCS 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 Picture Coding Symposium, PCS 2016
Y2 - 4 December 2016 through 7 December 2016
ER -