A reliability enhanced video storage architecture in hybrid SLC/MLC NAND flash memory

Yimei Kang, Xingyu Zhang, Zili Shao, Renhai Chen, Yi Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Video-based applications have been widely used in embedded mobile devices. In such devices, NAND flash memory chip is normally used as the storage media to store videos. To enlarge the capacity of NAND flash memory, MLC (multi-level cell) technology is widely adopted with low storage reliability compared with the classical SLC (single-level cell) technology. Thus, the inherent features of NAND flash memory will significantly affect the storage reliability of video files. In this paper, we propose a reliability enhanced MPEG video storage architecture (REVSA) in hybrid SLC/MLC storage systems. In this architecture, the video stream is reconstructed as the key cluster and the non-key cluster according to the importance of video restoration. The key cluster is stored in SLC blocks to ensure the reliability, while the non-key cluster is stored in MLC blocks to utilize its capacity. To achieve this, we introduce a new layer in the storage hierarchy called video bit-stream analyzer, which includes a segmentation pipeline and a merging pipeline for MPEG video stream to build clusters and merge them to original video stream. We conducted experiments in a hybrid SLC/MLC storage system to store the car driving videos. The experimental results show that the proposed scheme can significantly improve the storage reliability of the MPEG video files and prolong the lifetime of the storage system.

Original languageEnglish
Pages (from-to)33-42
Number of pages10
JournalJournal of Systems Architecture
Volume88
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • Hybrid NAND flash
  • MPEG video
  • Reliable storage
  • Storage architecture

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture

Cite this