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1. 发明授权

US06728313B1 Method and apparatus for performing MPEG II dequantization and IDCT 失效
标题翻译：用于执行MPEG II去量化和IDCT的方法和装置
公开(公告)号：US06728313B1
公开(公告)日：2004-04-27
申请号：US10174880
申请日：2002-06-18
申请人： Kuei-Chung Tu , Yan Liu , Jack Ouyang , Xiaoping Hu , Roger Hsu
发明人： Kuei-Chung Tu , Yan Liu , Jack Ouyang , Xiaoping Hu , Roger Hsu
IPC分类号： H04N712
CPC分类号： G06F17/147 , H04N19/42 , H04N19/436 , H04N19/60 , H04N19/61
摘要： A dequantization block is provided for performing dequantization calculations on a block of encoded video signal data using a modified standard quantization matrix. The modified standard quantization matrix is a product of a standard quantization matrix and a diagonal cosine matrix. The dequantization block receives a modified standard quantization matrix, the modified standard quantization matrix being a product of a standard quantization matrix corresponding to the encoded video data stream and a diagonal cosine matrix. In addition the dequantization block receives a scale representing a compression ratio of the encoded video data stream and non-zero IDCT coefficient matrix corresponding to a block of the encoded video data. The dequantization block then multiplies the scale, the non-zero IDCT coefficient matrix and the modified standard quantization matrix. An IDCT block is provided for performing IDCT calculations on each block processed by the dequantization block. The IDCT block then performs IDCT column and row calculations on the dequantization video signal data using a pipelining technique.
摘要翻译：提供了一种去量化块，用于使用修改的标准量化矩阵对编码的视频信号数据块进行去量化计算。修改的标准量化矩阵是标准量化矩阵和对角余弦矩阵的乘积。去量化块接收修改的标准量化矩阵，修改的标准量化矩阵是与编码的视频数据流对应的标准量化矩阵和对角余弦矩阵的乘积。此外，去量化块接收表示编码视频数据流的压缩比和对应于编码视频数据的块的非零IDCT系数矩阵的标度。逆量化块然后乘以比例，非零IDCT系数矩阵和修改的标准量化矩阵。提供IDCT块，用于对由反量化块处理的每个块执行IDCT计算。然后，IDCT块使用流水线技术对去量化视频信号数据执行IDCT列和行计算。

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