Method and apparatus for block data transfer to reduce on-chip storage for interpolative video resizing

Claim 1

A method of transferring a video image data from a host processor to a display adapter, said display adapter having at least a first and a second first-in first-out (FIFO) memory devices for temporarily storing transferred rows before processing, said first and said second FIFO memory devices storing different rows, said method comprising the steps of: dividing said image into three sets of arrays wherein the first set of arrays is of M columns and M rows of data, where M is an integer, and the second and third sets are of N×N arrays of data elements, where M=2N, said data being either RGB or YUV 4:2:2 pixel data or YUV 4:2:0 planar data; and transferring 1/2 row of the first array, 1/2 row of the second array, 1/2 row of the third array and 1/2 row of the first array until the video image is transferred.

Claim 2

A method of transferring a video image data from a host processor to a display adapter, said display adapter having at least a first and a second first-in first-out (FIFO) memory devices for temporarily storing transferred rows before processing, said first and said second FIFO memory devices storing different rows, said method comprising the steps of: dividing said image into three sets of arrays wherein the first set of arrays is of M columns and M rows of data, where M is an integer, and the second and third sets are of N×N arrays of data elements, where M=2N, said data being either RGB or YUV 4:2:2 pixel data or YUV 4:2:0 planar data; and transferring 1/2 row of the first array, 1/2 row of the second array, 1/2 row of the third array and 1/2 row of the first array until the video image is transferred.

Claim 3

An apparatus for transferring a video image data from a host processor to a display adapter, said display adapter having at least a first and a second first-in first-out (FIFO) memory devices for temporarily storing transferred rows before processing, said first and said second FIFO memory devices storing different rows, said apparatus comprising: means for dividing said image into three sets of arrays wherein the first set of arrays is of M columns and M rows of data, where M is an integer. and the second and third sets are of N×N arrays of data elements, where M=2N, said data being either RGB or YUV 4:2:2 pixel data or YUV 4:2:0 planar data; and means for transferring 1/2 row of the first array, 1/2 row of the second array, 1/2 row of the third array and 1/2 row of the first array until the video image is transferred.

Claim 4

An apparatus for transferring a video image data from a host processor to a display adapter, said display adapter having at least a first and a second first-in first-out (FIFO) memory devices for temporarily storing transferred rows before processing, said first and said second FIFO memory devices storing different rows, said apparatus comprising: means for dividing said image into three sets of arrays wherein the first set of arrays is of M columns and M rows of data, where M is an integer. and the second and third sets are of N×N arrays of data elements, where M=2N, said data being either RGB or YUV 4:2:2 pixel data or YUV 4:2:0 planar data; and means for transferring 1/2 row of the first array, 1/2 row of the second array, 1/2 row of the third array and 1/2 row of the first array until the video image is transferred.