Development of a Functional LSI Achieving Low-rate Multimedia Data Transmission.

点击翻译按钮获取中文摘要

The main goal of this research project is to develop a multimedia communication system including low-power system-LSIs that are developed for real-time low-rate image compression and decompression.This research develops two innovative results as follows.(1) A Low-rate Video Compression Algorithm using Vector-Quantization : FRMSHVQ FRMSHVQ stands for fixed-rate multistage Hierarchical Vector Quantization. It can compress a 10fps. Q-CIF (176×144) video sequence to 29.2kbps. FRMSHVQ uses vector quantization instead of DCT on MPEG which feature enables easy decompression by using a table look-up compared with IDCT operation on MPEG.(2) A Low-power DSP for FRMSHVQ : VP-DSP We have developed and implemented a low-power DSP for the FRMSHVQ algorithm called VP-DSP.VP-DSP stands for a vector-pipeline DSP.The register file of VP-DSP contains several long-bit (160-bit) registers for 16-parallel SIMD operations frequently used on FRMSHVQ.The implemented LSI works properly at 25MHz and 1.6V.The power dissipation is only 49mW for real-time encoding/decoding of a 10fps. QCIF video sequence.