Patent Number: 8,577,160

Title: Apparatus for coding or decoding an image by executing variable-length coding/decoding and fixed-length coding/decoding

Abstract: In an image coding apparatus, a transformation unit acquires a transformation coefficient by executing frequency transformation to an image. An extraction unit extracts a plurality of bits each from the transformation coefficient. A coding unit executes variable-length coding to the plurality of bits including a most significant bit, and executes fixed-length coding to the plurality of bits including a least significant bit. In an image decoding apparatus, an extraction unit extracts a plurality of bits from a code string. A decoding unit executes variable-length decoding to the plurality of bits including a most significant bit, and executes fixed-length decoding to the plurality of bits including a least significant bit. A connection unit acquires a transformation coefficient by connecting the plurality of bits each decoded. An inverse transformation unit generates the image by executing frequency-inverse transformation to the transformation coefficient.

Inventors: Asano; Wataru (Kanagawa-ken, JP)

Assignee: Kabushiki Kaisha Toshiba

International Classification: G06K 9/36 (20060101); G06K 9/46 (20060101)

Expiration Date: 1/05/12017