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A 90 mW MPEG-4 Video Codec LSI with the Capability for Core Profile
Takashi HASHIMOTO Shunichi KUROMARU Masayoshi TOUJIMA Yasuo KOHASHI Masatoshi MATSUO Toshihiro MORIIWA Masahiro OHASHI Tsuyoshi NAKAMURA Mana HAMADA Yuji SUGISAWA Miki KUROMARU Tomonori YONEZAWA Satoshi KAJITA Takahiro KONDO Hiroki OTSUKI Kohkichi HASHIMOTO Hiromasa NAKAJIMA Taro FUKUNAGA Hiroaki TOIDA Yasuo IIZUKA Hitoshi FUJIMOTO Junji MICHIYAMA
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/07/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Integrated Electronics
MPEG-4 visual, core profile, hybrid architecture, clock gating, embedded DRAM, low power,
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A low power MPEG-4 video codec LSI with the capability for core profile decoding is presented. A 16-b DSP with a vector pipeline architecture and a 32-b arithmetic unit, eight dedicated hardware engines to accelerate MPEG-4 SP@L1 codec, CP@L1 decoding and post video processing, 20-Mb embedded DRAM, and three peripheral blocks are integrated together on a single chip. MPEG-4 SP@L1 codec, CP@L1 decoding and post video processing are realized with a hybrid architecture consisting of a programmable DSP and dedicated hardware engines at low operating frequency. In order to reduce the power consumption, clock gating technique is fully adopted in each hardware block and embedded DRAM is employed. The chip is implemented using 0.18-µm quad-metal CMOS technology, and its die area is 8.8 mm 8.6 mm. The power consumption is 90 mW at a SP@L1 codec and 110 mW at a CP@L1 decoding.