Title :
Memory compression method considering memory bandwidth for HDTV decoder LSIs
Author :
Tajime, J. ; Takizawa, Takefumi ; Nogaki, S. ; Harasaki, H.
Author_Institution :
C&C Media Res. Labs., NEC Corp., Kawasaki, Japan
Abstract :
This paper proposes a frame memory compression method for an MPEG-2 Main Profile@High-Level (MP@HL) decoder LSI using Direct RambusTM DRAM (DRDRAM). The compression method is based on two-dimensional adaptive DPCM (2-D ADPCM) and is designed to achieve efficient memory access. HDTV bitstreams are decoded with a single 64 megabit (Mb) DRDRAM without subjective image quality degradation. Computer simulation is performed for ten HDTV bitstreams encoded at 22 Mbps. Simulation results show that, in the worst case, SNR loss compared to the full spec decoder is 0.71 dB for a luminance, 0.27 dB and 0.57 dB for chrominances.
Keywords :
DRAM chips; adaptive modulation; data compression; decoding; differential pulse code modulation; high definition television; image coding; large scale integration; video coding; DRAM; HDTV decoder LSIs; MPEG-2 Main Profile@High-Level; computer simulation; frame memory compression method; image quality degradation; memory bandwidth; memory compression method; two-dimensional adaptive DPCM; Bandwidth; Decoding; Degradation; HDTV; Image coding; Image quality; Large scale integration; Random access memory; Transform coding; Two dimensional displays;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.823002
