Design a Low-Power H.264/AVC Baseline Decoder at All Abstraction Levels—A Showcase |
| |
Authors: | Ke Xu Min Zhang Chiu Sing Choy |
| |
Affiliation: | (1) Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong |
| |
Abstract: | In this paper, we propose a low-power VLSI implementation of H.264/AVC baseline decoder. A systematic methodology for power
reduction is proposed and applied at various design abstraction levels. At the algorithm level, the computational complexity
is optimized. At the architecture level, pipelining and parallelism are widely adopted to reduce the operating frequency;
hierarchical memory organization optimizes power-hungry memory accesses; hardware sharing reduces the total switching capacitance.
At the circuit level, the knowledge about signal statistics is exploited to reduce number of transitions; data dependent signal-gating
and clock-gating are introduced which are dynamic techniques for power reduction; multiplications are reduced and optimized,
while complex dividers are totally eliminated. At the physical level, cell sizing and layout are optimized for power efficiency.
The VLSI implementation shows that with UMC 0.18 μm technology, the proposed design is able to decode realtime QCIF 30fps
at 1.5 MHz. The decoder contains 169 k logic gates and 2.5 KB on-chip SRAM. The total chip area is 4.4 × 4.4 mm2 in a CQFP 208 package. The measured power consumption is 973 μW @ 1.8 V and 293 μW @ 1.0 V. The low-power and realtime features
make our design ideal for portable or mobile applications. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|