Patent ID: 6363176
Filing Date: 2002-03-26
Classification: H04N

Abstract:
A picture data decompression apparatus for decompressing compressed picture data, said compressed picture data being obtained by orthogonal transform, quantization and variable length coding of original picture data, comprising:code pattern extraction means for extracting code patterns in units of n bits as an n-bit code pattern from the compressed picture data, n being an integral number greater than 1; a plurality of decoding and dequantization means, each of said plurality of decoding and dequantization means being selectable to simultaneously decode and dequantize a code pattern from said code pattern extraction means; and inverse orthogonal transform for inverse orthogonal transforming decoded and dequantized data from said plurality of decoding and dequantization means, wherein each of said plurality of decoding and dequantization means has a one-to-one correspondence with the n-bit code pattern extracted by the code pattern extraction means and decodes and dequantizes, from a code pattern of n bits extracted by said code pattern extraction means, predetermined variable length code patterns, wherein one of said plurality of decoding and dequantization means is selected based on the n-bit code pattern.