• Àüü
  • ÀüÀÚ/Àü±â
  • Åë½Å
  • ÄÄÇ»ÅÍ
´Ý±â

»çÀÌÆ®¸Ê

Loading..

Please wait....

±¹³» ³í¹®Áö

Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) °³¼±µÈ Anti-cloche Filter¿Í BPF ±×¸®°í ¿ÀÂ÷°¡ ¾ø´Â Á¦°ö±Ù±â¸¦ »ç¿ëÇÑ SECAM Encoder¿Í DecoderÀÇ ¼³°è
¿µ¹®Á¦¸ñ(English Title) Design of Digitalized SECAM Video Encoder with Modified Anti-cloche filter and SECAM Video Decoder with BPF and Error-free Square Root
ÀúÀÚ(Author) ÇÏÁÖ¿µ   ±èÁÖÇö   °­ºÀ¼ø   Jooyoung Ha   Joohyun Kim   Bongsoon Kang  
¿ø¹®¼ö·Ïó(Citation) VOL 10 NO. 03 PP. 0511 ~ 0516 (2006. 03)
Çѱ۳»¿ë
(Korean Abstract)
º» ³í¹®Àº °³¼±µÈ Anti-cloche filter¸¦ »ç¿ëÇÏ´Â SECAM video encoder¿Í ¿ÀÂ÷°¡ ¾ø´Â Á¦°ö±Ù±â¿Í BPF¸¦ »ç¿ëÇÏ´Â SECAM video decoder¸¦ Á¦¾ÈÇÏ°íÀÚ ÇÑ´Ù. SECAM video encoder´Â ITU-R BT.470¿¡ ÀÇÇØ ÁöÁ¤µÈ Anti-cloche filter¸¦ »ç¿ëÇÏÁö¸¸, Anti-cloche filter°¡ °¡Áö´Â Ư¼ºÀÌ ÁÖÆļö¿¡ µû¶ó ¸Å¿ì ±Þ°ÝÈ÷ º¯Çϱ⠶§¹®¿¡ µðÁöÅÐȸ·ÎÀÇ ¼³°è¿¡ Àû¿ëÇϱⰡ ¾î·Æ´Ù. ÀÌ·¯ÇÑ ¹®Á¦¸¦ ÇØ°áÇϱâ À§Çؼ­ º» ³í¹®¿¡¼­´Â Anti-cloche filterÀÇ ÁÖÆļö Ư¼ºÀÌ Á¿ì´ëĪÀ̶ó´Â Á¡À» ÀÌ¿ëÇÏ¿©¼­ Á¿ì´ëĪÀÇ Áß½ÉÀÌ µÇ´Â ÁÖÆļöÀÎ 4.286MHz¸¦ 0MHz·Î À̵¿ÇÏ¿© Anti-cloche filter¸¦ High Pass Filter(HPF)·Î º¯È¯ÇÑ´Ù. º¯È¯µÈ HPF´Â Anti-cloche filter¿¡ ºñÇØ ±¸Á¶°¡ °£´ÜÇϱ⠶§¹®¿¡ ¼³°è°¡ ºñ±³Àû ¿ëÀÌÇÏ´Ù. ¶ÇÇÑ º» ³í¹®¿¡¼­ Á¦½ÃÇÑ SECAM video decoder´Â ÁÖÆļö º¯Á¶µÈ ½ÅÈ£·ÎºÎÅÍ »öÂ÷½ÅÈ£(Db, Dr)¸¦ º¹¿øÇϱâ À§Çؼ­ ¿ÀÂ÷°¡ ¾ø´Â Á¦°ö±Ù±â¿Í µÎ °³ÀÇ ¹ÌºÐ±â ±×¸®°í »ï°¢ÇÔ¼ö¸¦ ÀÌ¿ëÇÏ¿© »ö»ó½ÅÈ£ÀÇ ÀâÀ½À» Á¦°ÅÇÏ°í CVBS(Composite Video Baseband Signal)·ÎºÎÅÍ »ö»ó½ÅÈ£¿Í ¹à±â½ÅÈ£¸¦ ºÐ¸®Çϱâ À§Çؼ­ BPF¸¦ »ç¿ëÇÑ´Ù. Á¦¾ÈµÈ ½Ã½ºÅÛÀº Altera FPGAÀÎ APEX20KE EP20K1000EBC652-3¿Í TV¸¦ ÀÌ¿ëÇÏ¿© ½Ç½Ã°£ °ËÁõÀ» ¼öÇàÇÏ¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this raper, we propose the Sequentiel Couleur Avec Memoire or Sequential Color with Memory (SECAM) video encoder system using modified anti-cloche filters and the SECAM video decoder system using a band pass filter (BPF) and an error-free square root. The SECAM encoder requires an anti-cloche filter recommended by International Telecommunication Union-Recommendation (ITU-R) Broadcasting service Television (BT) 470. However, the design of the anti-cloche filter is difficult because the frequency response of the anti-cloche filter is very sharp around rejection-frequency area. So, we convert the filter into a hish pass filter (HPF) by shifting the rejection frequency of 4.286MHz to 0Hz frequency. The design of HPF becomes very easy, compared to that of the anti-cloche filter. The proposed decoder also uses an error-free square root, two differentiators and trigonometric functions to extract color-component information of Db and Dr accurately from frequency modulation (FM) signals in SECAM systems. Also, the BPF in decoder it used for removing color noise in chrominance and dividing CVBS into chrominance and luminance. The proposed systems are experimentally demonstrated with Altera FPGA APEX20KE EP20K1000EBC652-3 device and TV sets.
Å°¿öµå(Keyword) SECAM   video encoder   video decoder   ITU-R BT.470  
ÆÄÀÏ÷ºÎ PDF ´Ù¿î·Îµå