ÇѱÛÁ¦¸ñ(Korean Title) |
MPEG-2 µðÄÚµùÀ» À§ÇÑ ¸ÖƼ¹Ìµð¾î ½Ã½ºÅÛ¿¡¼ ¿ì¼±¼øÀ§¿¡ ÀÇÇÑ Å½ºÅ© ½ºÄÉÁ층 ±â¹ý |
¿µ¹®Á¦¸ñ(English Title) |
A Prioritized Task Scheduling Method in Multimedia System for MPEG-2 Decoding |
ÀúÀÚ(Author) |
±èÁøȯ
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¿ø¹®¼ö·Ïó(Citation) |
VOL 12-B NO. 02 PP. 0173 ~ 0180 (2005. 04) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â MPEG-2 ºñµð¿À ½ºÆ®¸²ÀÇ ÇÁ·¹ÀÓÀ» µðÄÚµùÇÏ´Â ¸ÖƼ¹Ìµð¾î ŽºÅ©¿¡ ´ëÇÑ È¿À²ÀûÀÎ ½Ç½Ã°£ ½ºÄÉÁ층 ±â¹ýÀÌ Á¦½ÃµÈ´Ù. ŽºÅ© ¸ðµ¨¿¡¼ °¢ ÇÁ·¹ÀÓÀº °¢°¢ÀÇ ¸ÖƼ¹Ìµð¾î ŽºÅ©¿¡ ÀÇÇÏ¿© µðÄÚµùµÇ¸ç °¢ ŽºÅ©´Â ºñµð¿À ½ºÆ®¸²³» ÇÁ·¹ÀÓÀÇ ¼ø¼¿Í Áß¿äµµ¿¡ µû¶ó ¿ì¼±¼øÀ§°¡ ¼³Á¤µÈ´Ù. MPEG-2 ºñµð¿À ½ºÆ®¸²ÀÇ µðÄÚµù ±â´ÉÀ» ¼öÇàÇÏ´Â ¸ÖƼ¹Ìµð¾î ŽºÅ©¸¶´Ù CPU ´ë¿ªÆøÀ» È¿°íÀûÀ¸·Î ÇÒ´çÇÏ°íÀÚ ¿ì¼±¼øÀ§¿¡ ±â¹ÝÇÑ ½ºÄÉÁ층 ±â¹ýÀ» »ç¿ëÇÏ´Â °ÍÀÌ´Ù. º» ³í¹®¿¡¼ ¸ÖƼ¹Ìµð¾î ŽºÅ©¿¡ ÇÒ´çµÈ CPU ´ë¿ªÆøÀ» ¿ì¼±¼øÀ§¿¡ µû¶ó µ¿ÀûÀ¸·Î Á¦¾îÇÏ´Â ¹æ¹ýÀÌ ±â¼úµÈ´Ù. ¿ì¼±¼øÀ§¿¡ ÀÇÇÑ ½ºÄÉÁ층 ±â¹ýÀÇ ÁÖ¿ä ¸ñÀûÀº ¸ÖƼ¹Ìµð¾î ŽºÅ©µéÀÇ µðÄÚµù ½Ã°£À» °¨¼Ò½ÃÅ°´Â ÇÑÆí Á¾·á½ÃÇÑ ÀÌÈÄ¿¡ ½ÇÇàÀÌ ¿Ï·áµÇ´Â µðÄÚµù ŽºÅ©ÀÇ ¼ö¸¦ ÃÖ¼ÒÈÇÔÀ¸·Î½á ¸ÖƼ¹Ìµð¾î ½Ã½ºÅÛÀÇ ½Ç½Ã°£Àû ¼º´ÉÀ» Çâ»ó½ÃÅ°´Â °ÍÀÌ´Ù. Á¦½ÃµÈ ½ºÄÉÁ층 ±â¹ýÀÇ ¼º´ÉÀº ½Ã¹Ä·¹ÀÌ¼Ç ½ÇÇèÀ» ÅëÇÏ¿© ´Ù¸¥ ±â¹ý°ú ºñ±³ ºÐ¼®µÈ´Ù. |
¿µ¹®³»¿ë (English Abstract) |
In this paper, we propose an efficient real-time scheduling method of multimedia tasks for decoding frames of MPEG-2 video streams. In out task model, each frame is decoded by a separate multimedia task. The decoding task for each frame is assigned to the priority according to the precedence and importance of frames in a video stream. We use a priority-based scheduling policy in order to effectively allocate the CPU bandwidth to multimedia tasks for MPEG-2 decoding. We show how to dynamically control the fraction of the CPU bandwidth allocated to each multimedia task according to the priority. The primary purpose of our scheduling method is to enhance the real-time performance of the multimedia system by minimizing the number of decoding tasks that have missed their deadlines while reducing the decoding times of these multimedia tasks. The performance of this scheduling method is compared with that of similar mechanisms through simulation experiments. , |
Å°¿öµå(Keyword) |
¿ì¼±¼øÀ§
priority
½Ç½Ã°£
real time
Á¾·á½ÃÇÑ
deadline
½ºÄÉÁ층
Scheduling
MPEG
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