Inverse discrete cosine transformer

摘要

The present invention provides an IDCT apparatus for performing an IDCT operation on an input signal having a plurality of macroblocks of transformed coefficients and time gaps of variable duration, each of the time gaps being inserted between two successive macroblocks. The IDCT apparatus comprises an IDCT controller for generating a plurality of control signals, two IDCT processors for alternately converting the macroblocks of coefficients in the data signal into macroblocks of inverse transformed coefficients in response to the control signals. The outputs from the two IDCT processors are combined to the final inverse transformed output data signal from the IDCT apparatus.