06212236 is referenced by 32 patents and cites 6 patents.

Bitstream analyzing unit

111

fetches a coded block pattern and a coded quantized DCT coefficient from each block in a bitstream. Entropy decoding unit

112

decodes the coded block pattern into a block pattern and decodes the coded quantized DCT coefficient into pairs of a run length and an effectiveness factor. Dequantization unit

115

generates orthogonal transformation coefficients from the pairs of a run length and an effectiveness factor. Inverse Discrete Cosine Transform (IDCT) unit

110

generates a difference image from the orthogonal transformation coefficients. Decode controlling unit

110

instructs first selecting unit

118

to select constants “0”output from first constant generating unit

117

when the image is a “skipped” block. Image storage unit

120

stores a plurality of reference frame pictures having been decoded. Image restoring unit

119

restores an original block by adding a decoded difference image to a reference block read from the reference frame pictures stored in the image storage unit

120.

Title
Image decoding apparatus
Application Number
9/48190
Publication Number
6212236 (B1)
Application Date
March 25, 1998
Publication Date
April 3, 2001
Inventor
Tokuzo Kiyohara
Osaka
US
Makoto Hirai
Suita
US
Kozo Kimura
Osaka
US
Hideshi Nishida
Osaka
US
Agent
Price and Gess
US
Assignee
Matsushita Electric Industrial
US
IPC
H04N 7/12
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