Patent ID: 7555510
Filing Date: 2009-06-30
Classification: G06F

Abstract:
1. An inverse discrete cosine transform (IDCT) apparatus in a video codec for transforming one input matrix X having a plurality of image related discrete cosine transform (DCT) coefficients into image data in a plurality of specified columns in an output matrix Y via an IDCT procedure, the IDCT apparatus comprising: at least one input data control unit, each of the input data control units being used for outputting the input matrix X to at least one of the other input data control units, and for further generating at least one transform control signal together with each outputting of the input matrix X, the transform control signal indicating the decoded at least one specified column in the output matrix Y after the input matrix X is transformed via the IDCT procedure, wherein while receiving the transform control signal from another input data control unit, each of the input data control units generates a corresponding new transform control signal according to the received transform control signal; and at least one basic operation unit (BOU), each of the BOUs comprising processing circuitry for receiving the input matrix X and the transform control signal outputted from one of the input data control units, and for decoding the received input matrix X according to the transform control signal and obtaining the image data in said at least one specified column in the output matrix Y.