A system for combining a plurality of video signals and various forms of still imagery such as text or graphics into a single high resolution display is disclosed. The invention system utilizes a multiport memory and a key based memory access system to flexibly compose a multiplicity of video signals and still images into a full color high definition television display comprising a plurality of overlapping windows.
申请公布号
US4947257(A)
申请公布日期
1990.08.07
申请号
US19880253269
申请日期
1988.10.04
申请人
BELL COMMUNICATIONS RESEARCH, INC.
发明人
FERNANDEZ, ANTONIO;GAGGIONI, HUGO P.;JAQUEZ, MARTIN J.;ROBBINS, JOHN D.;SOPER, E. SCOTT