HDD embeded DSR
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Joined: Aug 2009
22-12-2009, 07:39 PM
This paper presents a new design and implementation of HDD (Hard Disk Drive) embedded DSR (Digital Satellite Receiver). The digital broadcasting technology enables multimedia access via broadcasting system. The amount of digital data to be processed is increased as compared to the previous broadcasting environment. In this paperâ„¢ a method is proposed to provide storage ability of a DSR to cope with these changes. Efficient digital data storage and management technology is also discussed. The real data recording and playing back are the most important function of the proposed system. The trick modes such as fast forward and fast backward support are the other important factors of the proposed system as compared to the previous analog recorders. The above-mentioned functions are the main evolution criteria for the system performance. The DSR uses new file system that is designed by considering disk cluster size and limited memory in the system, which is more appropriate than that of the general personal computer. This system enables us to watch broadcasting and to manage multimedia data efficiently.
As the digital satellite broadcasting is developing, the needs for efficient management of various multimedia dates have been increased. The increase in the number channel makes it difficult to select channel that they want. Efficient digital data storage and management are the indispensable as the demand for multimedia increases. This paper presents a system, which embeds the HDD to record the broadcasting data and play them back whenever the user wants.
Nowadays, efficient storage and management of enormous broadcasting data are necessary, as the digital broadcasting is getting popular rapidly. According to the current situation, the international standards such as MPEG (moving picture experts group) â€œ2, MPEG-3, and MPEG-7, have established efficient data storage and transmission. The standards such as DVB (digital data broadcasting) and ATSC (Advanced Television Committee) are established in order to apply these standards to the real broadcasting system. The characteristic of the digital broadcasting is multi-program emission through only one single physical channel so that the number of logical channels will be much more than that of analog TV channels. It is not easy to find the beloved program among a large number of programs because the number logical channels increases in geometric progress as the broadcasting environment changes from analog to digital. Therefore, the probabilities that the program the user wants can be broadcasted at the same time are increased.
The emergence of the digital broadcasting technology enables multimedia data access besides TV programs via broadcasting. As a result, the multimedia data will be increased remarkably. With increasing multimedia data, the needs for managing these data efficiently have been increased rapidly. Therefore, the combination of the digital data storage device and DSR is essential to store and process such a large amount of data. The only recording device used in the past years was VCR (video cassette recorder). This was suitable for the analog-broadcasting environment. However, as the broadcasting environment is changed to digital, the alternative solution for digital recording is needed, and HDD is regarded as the best solution for storage of digital data. The ATA (AT Attachment) is the HDD interface standard between host system and storage device. Almost all HDD used nowadays are IDE (Intelligent drive Electronics) or AT bus interface type, which implement the ATA standard. This type of HDD used because it is most prevailing and cheaper than any other HDD type. The HDD can satisfy these needs by its speed, accuracy, random accessibility, and low price.
Multimedia information requires a new physical data structure for its efficient storage and retrieval. This data structure must meet the real-time dead line required for replaying the media. We develop an audio video stream recording system with efficient file management for the intelligent DSR. Time-shift viewing, which means that a program is recorded at the same time while another program saved previously being viewed, is one of the important functions of the proposed system. This paper present design and implementation of DSR, which can store, retrieve and classify the broadcast data by implementing an interface between the conventional DSR and digital storage media.
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