Patent ID: 6928115
Filing Date: 2005-08-09
Classification: H04N

Abstract:
1. A decoding apparatus configured to decode compression-encoded video data including a variable length code, comprising: a plurality of decompression processors to decompress a plurality of compression-encoded video data corresponding to a plurality of channels, respectively, each of the decompression processors including: a variable length decoder which decodes the variable length code to output zero-run length data and nonzero coefficients; an inverse quantizer which inverse-quantizes the nonzero coefficients to output an inverse-quantized result; a zero-run reconstruction device configured to reconstruct zero coefficients corresponding to the zero-run length data; and a FIFO (First-In First-Out) memory arranged between the inverse quantizer and the zero-run reconstruction device configured to store the nonzero coefficients of the inverse-quantized result, the memory operating with first-in first-out and having a memory capacity for storing coefficients contained in a plurality of blocks; a plurality of parameter extractors provided corresponding to the decompression processors, configured to generate parameters concerning one macro-block every time the variable length decoder included in each of the decompression processors completes decoding of one block; an inverse discrete cosine transformer which subjects the coefficients from the decompression processors to inverse discrete cosine transformation to obtain transformed coefficients; and a motion compensator which subjects the transformed coefficients to a motion compensation in accordance with the parameters concerning one block input from the parameter extractors alternately.