Patent ID: 6310657
Filing Date: 2001-10-30
Classification: G09G,H04L,H04N

Abstract:
An on-screen display apparatus, comprising:a data processor for generating a plurality of windows for on-screen display;a memory coupled to said data processor for receiving therefrom and storing window information representative of said windows; andan on-screen display controller coupled to said memory, said on-screen display controller having an input for receiving information indicative of a current display line of the on-screen display, said on-screen display controller responsive to said current display line information for identifying segments of said windows that are to be displayed on said current display line and for obtaining from said memory portions of said window information that respectively represent said identified segments for use in producing said current display line, said on-screen display controller further comprising:a windows controller for providing positional information indicative of respective positions of said windows in the on-screen display, said on-screen display controller responsive to said positional information for identifying said segments; andan address calculator coupled to said windows controller and responsive to said positional information for determining addresses for respectively accessing said information portions in said memory, wherein said address calculator is further responsive to said positional information for calculating sizes of the respective information portions.