Freescale Semiconductor,inc.

Gregory C Ng

Leo G Dehner

Ning Chen

Yong Yan

Christopher Joseph Daniels

Wendy F Reed

A data reordering system for determining addresses associated with a vector of transformed data and corresponding method of reordering transformed data, where the data reordering system includes: a first transform function coupled to a data vector and operable to provide the vector of transformed data; a reordering function, including a plurality of counters, that is operable to determine a plurality of offset addresses, with a, respective, offset address for each element in the vector of transformed data; and an adder operable to add a base address that corresponds to the first address to the each, respective, offset address to provide a sequence of addresses suitable for accessing the vector of transformed data to provide a re-sequenced vector of transformed data.

Methods and apparatus for reordering data

A video encoder and a decoder analyze the spatial content video data in an H.264 stream using the discrete cosine transform (DCT). Although the DCT is computed as part of the H.264 encoding process, it is not computed as part of the decoding process. Thus, one would compute the DCT of the video data after it has been reconstructed by the video decoder for video post-processing or enhanced video encoding. A method for accelerating the computation of the DCT at the decoder side when transmitting intra-mode macroblocks uses information computed by the encoder and transmitted as part of the H.264 video stream.

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Austin, TX, United States of America

Gregory C Ng