| 摘要 |
<p>Many video processing applications are time constrained applications with multiple complex computation intensive algorithms such as the two-dimensional 8x8 inverse discrete cosine transforms (IDCT). It is advantageous to meeting performance requirements to have a programmable processor that can achieve extremely high performance on the 2D 8x8 function. The ManArray 2x2 processor (100) is able to process the 2D 8x8 IDCT in 34-cycles and meet the IEEE standard 1180-1990 for precision of the IDCT. A unique distributed 2D 8x8 IDCT process is presented along with the unique data placement supporting the high performance algorithm. Also, a scalable 2D 8x8 IDCT algorithm operable on various distinct arrays of differing numbers of processors is presented. Very long instruction word memory (VIM) (109) size is minimized by reuse of VLIWs, and further application processing is streamlined by having the IDCT results output in a standard row-major order. The techniques are applicable to cosine transforms generally.</p> |
