International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
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An Efficient Real-Time Controller for Retrieving Multimedia Data from Secured Digital High Capacity Card Sekata Olika Abdenaa1, Dr. Vasu Pinnti2 College of Engineering, Wolaita Sodo University, Sodo, Ethiopia Professor, ECE Dept, College of Engineering, Wolaita Sodo University, Sodo, Ethiopia ---------------------------------------------------------------------***--------------------------------------------------------------------error correction code (ECC) algorithms, defect handling Abstract - Real-time multimedia data access plays an diagnostics, power management, and clock control [1]. important role in electronic systems; as time goes by, However, to interface the SDHC card (slave unit) with master with decrease in data processing speed and increase in unit (e.g., computer, any application-specific device or host), communication time, storage time, access time, and the we need a system which can communicate with the on-card overall response time increases for real-time controller of the SDHC card for smooth execution of applications. Therefore, in our paper, a fast and efficient single/multi block data read/write. real-time controller has been proposed and implemented where large volume of multimedia data can be efficiently Fig.1 represents a model of a data archival system and it and effectively stored and retrieved from flash memory shows that how the flash - based memory cards like micro cards. It is being implemented only using hardware SD or SDHC cards can be used as the plug and play memory description language (HDL) on a field programmable module for real-time application. Generally, the signal is gate array (FPGA) chip without using any other external received from the external world in a buffer, converted into a hardware resources or high-level languages. The entire serial bit stream and subsequently stored into the memory controller architecture, in a single chip, contains 5 card. The stored data at later stage may be transmitted for variant modules and is designed and developed using further processing. Also, the flash memory acts as a small, finite state machine (FSM)-based approach. The modules portable unit and it can be removed from the system where are Card Initialization Module (CIM), Idle Module (IM), it is presently housed in and accessed by some other system card Access module (CAM), card store module (CSM), and to retrieve the desired signal. decision making module (DMM). The experimental results tested for microSD, and SDHC cards of different size, and these show that the architecture uses less hardware and clock cycles for card initialization and single/multiblock read/write procedure. 2Associate
1Dean,
Key Words: multimedia, Real-time controller, card initialization, decision making, 1. INTRODUCTION
Fig. 1 A model of a data archival system
The flash-based storage device, introduced by Toshiba in 1984, is basically a non-volatile memory and used whenever a shock resistance is the key requirement of any application [1]. The Secured Digital High Capacity (SDHC) card is mainly designed to meet certain requirements such as security, capacity, performance, and environmental issues inherent in newly emerging audio and video consumer electronic devices. The SD (Secured Digital) card standard is designed and Developed by SD Card Association [2] and is a collaborative effort of the three (3) manufacturers, namely Toshiba, SanDisk, and MEI [3].
The flash memory is useful in the fields where data transportation and archival are the key requirements. This memory can be used as a data concentrator (Fig. 2) where the proposed controller architecture along with the flash memory can be used as the removable memory of any data concentrator network device. The flash memory device has extensive application in database [4], networking [5], biomedical application [6, 7], virtualized storage system [8], cloud computing [9], geographic remote sensing [10], mobile devices [11–13], etc. It can be used in a router to store the routing table for further access. NAND-based flash system is also widely employed as cache in virtualized system [8].
The SD card includes an on card intelligent controller to handle the security algorithms, interface protocol, data storage and retrieval, error handling and corresponding
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