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公开(公告)号：CA2102936A1
公开(公告)日：1995-03-31
申请号：CA2102936
申请日：1993-11-12
Applicant: ATI TECHNOLOGIES INC
Inventor： LEONE PASQUALE
Abstract: The present invention relates to a method of aligning and blending input digital samples, comprised of delaying the input samples by a clock pulse, to provide delayed data samples, subtracting a smaller fractional part from a larger fractional part of either an input sample number and a requested sample number to provide a sample difference number first factor, subtracting the sample difference number from 1 to provide a second factor, multiplying either of the input samples or the delayed samples by the first factor to provide a first result, multiplying the other of the input samples or the delayed samples by the second factor to provide a second result, and adding the results to provide output samples.
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公开(公告)号：CA2192532C
公开(公告)日：2007-01-23
申请号：CA2192532
申请日：1996-12-10
Applicant: ATI TECHNOLOGIES INC
Inventor： LEONE PASQUALE
Abstract: A software/hardware hybrid video decoder, particularly suited for decoding MPEG video, that takes advantage of processing capabilities of graphics coprocessors to perform the motion compensation portion of video decoding. Motion compensation is performed by bit block transfer (bit BLT) operations on the graphics coprocessor. The bit BLT operations perform the addition of pixels in the reference and error blocks. Bit BLT operations may also be used for interpolation between reference blocks to provide subpixel resolution for motion vectors.
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公开(公告)号：CA2192532A1
公开(公告)日：1997-09-15
申请号：CA2192532
申请日：1996-12-10
Applicant: ATI TECHNOLOGIES INC
Inventor： LEONE PASQUALE
Abstract: A software/hardware hybrid video decoder, particularly suited for decoding MPEG video, that takes advantage of processing capabilities of graphics coprocessors to perform the motion compensation portion of video decoding. Motion compensation is performed by bit block transfer (bit BLT) operations on the graphics coprocessor. The bit BLT operations perform the addition of pixels in the reference and error blocks. Bit BLT operations may also be used for interpolation between reference blocks to provide subpixel resolution for motion vectors.
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公开(公告)号：CA2102936C
公开(公告)日：1999-03-30
申请号：CA2102936
申请日：1993-11-12
Applicant: ATI TECHNOLOGIES INC
Inventor： LEONE PASQUALE
Abstract: Digital samples of e.g. video data to be displayed on a computer monitor is processed by a video graphics circuit, which has the task of both aligning samples provided by an asynchronous sampler, and blending those samples, which usually suffer a series of the degrading effect as a low pass filter. The present invention describe a circuit that combines a sample aligner and a sample blender into one circuit in which the sample data passes through only one filter, and thus suffers only one low pass effect. In addition, only two multipliers, one delay, and one adder are required, instead of double the number as would be required by using the prior art. The total amount of circuitry is thus reduced and the quality of the resulting signal is improved.
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