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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) SVC ºñµð¿À Àü¼ÛÀ» À§ÇÑ ½Ç¿ëÀûÀÎ TCP ģȭÀû Àü¼Û·ü Á¦¾î ±â¹ý
¿µ¹®Á¦¸ñ(English Title) A Practical TCP-friendly Rate Control Scheme for SVC Video Transport
ÀúÀÚ(Author) ¼­±¤´ö   Kwangdeok Seo  
¿ø¹®¼ö·Ïó(Citation) VOL 15 NO. 02 PP. 0114 ~ 0124 (2009. 02)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®¿¡¼­´Â ÀÎÅͳݰú °°Àº IP¸Á¿¡¼­ SVC(scalable video coding) ºñµð¿À¸¦ Àü¼ÛÇÒ ¶§ ÁÖ¾îÁø ÃÖ¼Ò Àü¼Û´ë¿ªÆø Á¶°Ç¿¡ ºÎÇյǴ ½Ç¿ëÀûÀÎ TCP ģȭÀû Àü¼Û·ü Á¦¾î ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. UDP ÇÁ·ÎÅäÄÝÀ» ÀÌ¿ëÇÏ¿© ½Ç½Ã°£ ºñµð¿À¸¦ Àü¼ÛÇÒ ¶§ »óÀ§ ÀÀ¿ë°èÃþÀÇ ÇÁ·ÎÅäÄݷμ­ ½Ç½Ã°£ ¼ö¼Û ÇÁ·ÎÅäÄÝ(RTP)°ú ½Ç½Ã°£ ¼ö¼Û Á¦¾î ÇÁ·ÎÅäÄÝ(RTCP)ÀÌ ÀϹÝÀûÀ¸·Î »ç¿ëÀÌ µÇ´Âµ¥, À̶§ ¹ß»ýµÇ´Â ÆÐŶ ½ºÆ®¸²ÀÇ Àü¼Û·üÀ» ³×Æ®¿öÅ© ³»¿¡¼­ÀÇ ´Ù¸¥ TCP¼¼¼Ç°ú °øÆòÇÏ°Ô ºÐ¹èÇÏ¿© °áÁ¤ÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀÌ TCP ģȭÀû Àü¼Û·ü Á¦¾î (TCP-friendly rate control) ±â¹ýÀÌ´Ù. ±âÁ¸ÀÇ TCP ģȭÀû Àü¼Û·ü Á¦¾î ±â¹ý¿¡¼­ Á¦¾ÈÇÑ Àü¼Û·ü °áÁ¤ ¸ðµ¨¿¡¼­´Â ä³ÎÀÇ ÃÖ¼Ò Àü¼Û ´ë¿ªÆø¿¡ ´ëÇÑ °í·Á°¡ ¹Ý¿µÀÌ µÇÁö ¸øÇÏ¿© ÆÐŶ ¼Õ½ÇÀÌ Å« °æ¿ì¿¡ ´ëÇؼ­´Â ¸ðµ¨¿¡ ÀÇÇØ °áÁ¤µÈ Àü¼Û·üÀÌ Ã¤³ÎÀÇ ½ÇÁ¦ ÃÖ¼Ò Àü¼Û ´ë¿ªÆø°ú ¸Å¿ì »óÀÌÇÑ ¹®Á¦Á¡ÀÌ ¹ß»ýÇÑ´Ù. º» ³í¹®¿¡¼­´Â ÃÖ¼Ò Àü¼Û ´ë¿ªÆøÀ» °í·ÁÇÏ¿© °³¼±µÈ TCP ģȭÀû Àü¼Û·ü Á¦¾î ¸ðµ¨À» °í¾ÈÇÏ°í, ÀÌ ¸ðµ¨À» ±â¹ÝÀ¸·Î SVCÀÇ ±âº»°èÃþ(base layer)¿¡ ´ëÇØ ÃÖ¼Ò Àü¼Û·üÀ» ÇÒ´çÇÏ¸ç ³ª¸ÓÁö °¡¿ëÇÑ Àü¼Û·üÀ» Çâ»ó°èÃþ (enhancement layer) ½ºÆ®¸²¿¡ ÇÒ´çÇÏ´Â TCP ģȭÀû ½ºÄÉÀÏ·¯ºí ºñµð¿À Àü¼Û ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ½ÇÁ¦ÀûÀÎ ÀÎÆ®¶ó ¹× ÀÎÅÍ³Ý ¸ÁÀ» ÅëÇÑ SVC ºñµð¿À Àü¼Û¿¡ ÀÇÇÑ Çʵå Å×½ºÆ®¸¦ ÅëÇØ Á¦¾ÈµÈ ±â¹ýÀÇ ¼º´ÉÀ» °ËÁõÇÑ´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper, we propose a practical TCP friendly rate control scheme that considers the minimum channel bandwidth of the network when transporting SVC (scalable video coding) video over IP netowrks such as Internet. RTP and RTCP is mainly designed for use with UDP (User Datagram Protocol) for real-time video transport over the Internet. TCP-friendly rate control was proposed to satisfy the demands of multimedia applications while being reasonably fair when competing for bandwidth with conventional TCP applications. However the rate control model of the conventional TCP-friendly rate control scheme does not consider the minimum channel bandwidth of the network. Thus the estimated channel bandwidth by the conventional rate control model might be quite different from the real channel bandwidth when the packet loss ratio of the network is very large. In this paper, we propose a modified TCP-friendly rate control scheme that considers the minimum channel bandwidth of the network. Based on the modified TCP-friendly rate control, we assign the minimum channel bandwidth to the base layer bitstream of SVC video, and remaining available bandwidth is allocated to the enhancement layer of SVC video for the TCP friendly scalable video transmission. It is shown by simulations that the modified TCP-friendly rate control scheme can be effectively used for a wider range of controlled bit rates depending on the packet loss ratio than the conventional TCP-friendly control scheme. Furthermore, the effectiveness of the proposed scheme in terms of objective video quality is proved by comparing PSNR performance with the conventional scheme.
Å°¿öµå(Keyword) SVC ºñµð¿À ¾ÐÃà   SVC video coding   TCP ģȭÀû Àü¼Û·ü Á¦¾î   TCP-friendly rate control   ¸ðµ¨ ±â¹Ý Àü¼Û·ü Á¦¾î   model-based rate control   SVC ºñµð¿À Àü¼Û   SVC video transport  
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