公开(公告)号：US20010014904A1

公开(公告)日：2001-08-16

申请号：US09828231

申请日：2001-04-09

Applicant: Sony Electronics, Inc.

Inventor： Naxin Wang

IPC: G06F017/14

CPC classification number: G06F17/147

Abstract: Methods and apparatus for performing a fast two-dimensional inverse discrete cosine transform (IDCT) in a media processor are disclosed. A processor receives at least one input component representing discrete cosine transform data and combines, in a first stage, the at least one input component with a first set of constants. In a media processor with a partitioned SIMD architecture, the input data and first set of constants may be combined, for example, by multiplying the at least one input component with a first set of constants using a complex multiplication instruction. The output is transposed in a second stage and combined with constants in a third stage.

Abstract translation: 公开了在媒体处理器中执行快速二维逆离散余弦变换（IDCT）的方法和装置。 处理器接收表示离散余弦变换数据的至少一个输入分量，并且在第一阶段中将至少一个输入分量与第一组常数组合。 在具有分区SIMD架构的媒体处理器中，可以例如通过使用复数乘法指令将至少一个输入分量与第一组常数相乘来组合输入数据和第一组常数。 输出在第二阶段转置，并与第三阶段的常数组合。