A High-Performance Videophone Chip with Dual Multimedia VLIW Processor Cores (Special Issue on Low-Power High-Performance VLSI Processors and Technology)

概要

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A chip is described that integrates two multimedia VLIW processor cores with a hardware streaming engine [1]. 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 100mm^2 die that contains 700K logic gates, 60KB RAM, and 16KB ROM, in a 0.25-μm CMOS standard cell technology. At 65MHz operating frequency, it can process H.263 video coding at CIF 15frames/sec, and G.723.1 audio coding with an 80% processing time allocation
社団法人電子情報通信学会の論文
2001-02-01