Hardware Software Co-design of H.264 Baseline Encoder on Coarse-Grained Dynamically Reconfigurable Computing System-on-Chip

Hung K. NGUYEN  Peng CAO  Xue-Xiang WANG  Jun YANG  Longxing SHI  Min ZHU  Leibo LIU  Shaojun WEI  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E96-D   No.3   pp.601-615
Publication Date: 2013/03/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E96.D.601
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Computer System
Keyword: 
reconfigurable computing,  reconfigurable multimedia system,  REMUS-II,  coarse-grained dynamically reconfigurable architecture,  H.264/AVC encoder,  

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Summary: 
REMUS-II (REconfigurable MUltimedia System 2) is a coarse-grained dynamically reconfigurable computing system for multimedia and communication baseband processing. This paper proposes a real-time H.264 baseline profile encoder on REMUS-II. First, we propose an overall mapping flow for mapping algorithms onto the platform of REMUS-II system and then illustrate it by implementing the H.264 encoder. Second, parallel and pipelining techniques are considered for fully exploiting the abundant computing resources of REMUS-II, thus increasing total computing throughput and solving high computational complexity of H.264 encoder. Besides, some data-reuse schemes are also used to increase data-reuse ratio and therefore reduce the required data bandwidth. Third, we propose a scheduling scheme to manage run-time reconfiguration of the system. The scheduling is also responsible for synchronizing the data communication between tasks and handling conflict between hardware resources. Experimental results prove that the REMUS-MB (REMUS-II version for mobile applications) system can perform a real-time H.264/AVC baseline profile encoder. The encoder can encode CIF@30 fps video sequences with two reference frames and maximum search range of [-16,15]. The implementation, thereby, can be applied to handheld devices targeted at mobile multimedia applications. The platform of REMUS-MB system is designed and synthesized by using TSMC 65 nm low power technology. The die size of REMUS-MB is 13.97 mm2. REMUS-MB consumes, on average, about 100 mW while working at 166 MHz. To my knowledge, in the literature this is the first implementation of H.264 encoding algorithm on a coarse-grained dynamically reconfigurable computing system.