Efficient 2D DCT architecture based on approximate compressors for image compression with HEVC intra-prediction
Yükleniyor...
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Institute for Ionics
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
This study presents a design of two-dimensional (2D) discrete cosine transform (DCT) architecture to be used with high efciency video coding (HEVC) intra-prediction method in image compression. Since the amount of calculation required
by the transform step in HEVC is high and accordingly the power consumption is high, a novel DCT architecture for HEVC
is proposed to reduce this calculation complexity and power consumption. This architecture is based on erroneous calcula tions in the steps, which can be ignored in the quantizing step. For this purpose, approximate 5:3 compressor circuits with
diferent error rates are designed and used instead of addition/subtraction in DCT architecture. This DCT architecture is
designed to support 4×4, 8×8, 16×16 and 32×32 transform blocks. The designed architecture is performed on FPGA
and experiments are conducted. In these experiments, hardware performance parameters are examined, and it is proved that
the use of approximate compressor can provide advantages on power consumption and physical area. The efciency of the
proposed architecture is investigated by performing image compression and video coding tests.
Açıklama
Anahtar Kelimeler
HEVC, Intra-prediction, Image compression, Approximate compressor, 2D DCT architecture
Kaynak
Journal of Real-Time Image Processing
WoS Q Değeri
Q2
Scopus Q Değeri
N/A
Cilt
20
Sayı
2
