초록 ▼

The subtractor of the reception system calculates the channel quality using an optimal guard interval length detection signal inserted into one carrier by the transmission system, then the optimal guard interval length detector calculates the minimum guard interval length necessary to eliminate dela

The subtractor of the reception system calculates the channel quality using an optimal guard interval length detection signal inserted into one carrier by the transmission system, then the optimal guard interval length detector calculates the minimum guard interval length necessary to eliminate delayed signals using this calculated channel quality, inserts the control signal indicating this guard interval length into one carrier and the reception system sets the guard interval length using this control signal.

대표청구항 ▼

The subtractor of the reception system calculates the channel quality using an optimal guard interval length detection signal inserted into one carrier by the transmission system, then the optimal guard interval length detector calculates the minimum guard interval length necessary to eliminate dela

The subtractor of the reception system calculates the channel quality using an optimal guard interval length detection signal inserted into one carrier by the transmission system, then the optimal guard interval length detector calculates the minimum guard interval length necessary to eliminate delayed signals using this calculated channel quality, inserts the control signal indicating this guard interval length into one carrier and the reception system sets the guard interval length using this control signal. al signal to the recording medium, with a reference value and outputting a counted value based on the comparison; differentiating the first power level data from the counted value and outputting second power level data; and adjusting the power level of the laser diode to a power level corresponding to a sum of the first and second power level data. 1, 20020400, Graham et al.; US-6377983, 20020400, Cohen et al.; US-6389434, 20020500, Rivette et al.; US-6393422, 20020500, Wone; US-6397264, 20020500, Stasnick et al.; US-6405221, 20020600, Levine et al.; US-6421065, 20020700, Walden et al.; US-6446110, 20020900, Lection et al.; US-6450058, 20020900, Latz et al.; US-6490603, 20021200, Keenan et al.; US-6535294, 20030300, Arledge, Jr. et al.; US-6539370, 20030300, Chang et al.; US-6571295, 20030500, Sidana; US-6580821, 20030600, Barile; US-20020097261, 20020700, Gothurcht et al.; US-20020099552, 20020700, Rubin et al. eached; saving information associated with a stamp position that is in an adjacent tile, if any, into a corresponding stamp context of a plurality of stamp contexts; the saved information including said stamp position; jumping to another stampline in the one tile and repeating the moving, saving, and jumping steps until all pixels that are in an intersection of the graphic object and the tile have been traversed; and restoring from a stamp context of the plurality of stamp contexts the saved stamp position so as to position the stamp in another tile, and repeating the moving, saving, jumping and restoring steps until all pixels of the graphic object have been traversed. 2. The method of claim 1 wherein the plurality of stamp contexts include a first stamp context for storing a stamp position adjacent to a current stamp position, and a second stamp context for storing a stamp position that is adjacent to the current stamp position and in a tile adjacent to the current tile. 3. The method of claim 1 wherein the plurality of stamp contexts include a first stamp context for storing a stamp position adjacent to a current stamp position in a direction perpendicular to a direction of movement of the stamp along a stampline, and a second stamp context for storing a stamp position in an adjacent tile in the same direction as the direction of movement of the stamp along a stampline. 4. The method of claim 1 wherein the plurality of stamp contexts include a first stamp context for storing a stamp position adjacent to a current stamp position in a direction perpendicular to a direction of movement of the stamp along a stampline, a second stamp context for storing a stamp position adjacent to the current stamp position in the opposite direction from the first stamp context, and a third stamp context for storing a stamp position in an adjacent tile in the same direction as the direction of movement of the stamp along a stampline. 5. The method of claim 1 wherein the stamp moves vertically along column stamplines before moving to the next stampline. 6. The method of claim 1 wherein the stamp moves horizontally along row stamplines before moving to the next stampline. 7. The method of claim 1 wherein the graphic object includes a plurality of vertices and the method includes: determining a minimal rectangular bounding box for the graphic object; and selecting a starting vertex from the plurality of vertices, the starting vertex lying on a side of the minimal rectangular bounding box, and positioning the stamp to a pixel position such that the stamp contains the starting vertex prior to performing the first moving step. 8. The method of claim 7 wherein the starting vertex is positioned on a corner of the minimal rectangular bounding box. 9. The method of claim 1 including evaluating a plurality of edge functions at each of a plurality of points whose positions are determined relative to a current stamp position to produce a corresponding set of edge function results, and using said edge function results to determine when to perform the move, save, jump, and restore steps. 10. The method of claim 1, wherein the tile includes left, right, top and bottom boundaries; the method including determining whether the current stamp position is at one or more of the left, right, top, and bottom boundaries of the tile. 11. The method of claim 1 wherein: information associated with the pixels is stored in a frame buffer memory; the frame buffer memory includes a frame buffer cache having frame buffer cache lines; each frame buffer cache line is capable of storing information associated with a plurality of the pixels; and all the information capable of being stored in each frame buffer cache line corresponds to pixels located in only one of the tiles. 12. The method of claim 1 wherein: information associated with the pixels is stored in a frame buffer memory; the frame buffer memory is partitioned into a plurality of frame buffer