Patent ID: 6728313
Filing Date: 2004-04-27
Classification: G06F,H04N

Abstract:
In a video decoder, an apparatus for performing dequantization and IDCT calculations in parallel, said apparatus comprising:a dequantization block capable of performing dequantization calculations on a block of encoded video signal data using a modified standard quantization matrix, the block of encoded video signal data including data comprising a plurality of IDCT coefficients corresponding to a block of encoded input data stream, and an index for determining a location of the data within the block, the index transferring only non-zero data, the modified standard quantization matrix being a product of a standard quantization matrix and a cosine matrix, the dequantization block producing dequantization output data; and an IDCT block capable of performing IDCT calculations on the dequantization output data, wherein said dequantization block and said IDCT block process each block of encoded video signal data in parallel.