A High-Performance Videophone Chip with Dual Multimedia VLIW Processor Cores

Jeong-Min KIM
Kwang-Sun LEE
Sang-Il HAN
Sang-Gyu PARK

IEICE TRANSACTIONS on Electronics   Vol.E84-C    No.2    pp.183-192
Publication Date: 2001/02/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Low-Power High-Performance VLSI Processors and Technologies)
VLIW,  media processor,  videophone,  

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A chip is described that integrates two multimedia VLIW processor cores with a hardware streaming engine. It can implement a real-time videophone, or an MPEG4 codec. Each processor core has identical resources, and shares the memory and system I/O interface units. With its symmetric structure, applications can be executed on either processor without constraints. To accelerate multimedia-specific applications, the architecture of this processor has several features. It merges the features of a RISC and a DSP, its instruction set is extended to accelerate both video and audio applications, and it supports an efficient embedded memory system, to reduce both the bandwidth and the latency for multimedia applications needing frequent memory accesses. The chip size will be 100 mm2 die that contains 700 K logic gates, 60 KB RAM, and 16 KB ROM, in a 0.25-µm CMOS standard cell technology. At 65 MHz operating frequency, it can process H.263 video coding at CIF 15 frames/sec, and G.723.1 audio coding with an 80% processing time allocation.