Being discussed at present is the so-called "letter-box" method for the insertion of a 16:9 wide-picture format into existing standard systems (e.g. PAL, SECAM, NTSC) in 4:3 format. Format information is transmitted as auxiliary data in the so-called ultra-black region. The invention calls for an increase in black level to be inserted in the composite video signal (FBAS). This shifts the clamping reference value, thus shifting the black level. The additional information in the ultra-black region thus created can be transmitted at a high signal level.
申请公布号
DE3936179(A1)
申请公布日期
1991.05.02
申请号
DE19893936179
申请日期
1989.10.31
申请人
DEUTSCHE THOMSON-BRANDT GMBH, 7730 VILLINGEN-SCHWENNINGEN, DE