Kabushiki Kaisha Toshiba

Hiromitsu Nakayama

Takaya Ogawa

Yoshinori Shigeta

Kiwamu Watanabe

Tatsuhiro Suzumura

Masashi Jobashi

Shuji Michinaka

Akihiro Oue

Satoshi Takekawa

Shinichiro Koto

Yasuhiro Taniguchi

Atsushi Matsumura

Susumu Kubota

Shunichi Ishiwata

Shuo Nomura

A moving image compression-coding device has a pixel determination module configured to determine whether a color of each pixel in a macro block having a plurality of pixels in an input image is a predetermined color, a pixel counter configured to count a number of the pixels having the predetermined color in the macro block, a macro block determination module configured to determine whether a color of the macro block is considered to be the predetermined color according to the count result, and a compression-coded data generator configured to compression-code the input image with a compression ratio depending on the determination result.

Moving image compression-coding device, method of compression-coding moving image, and H.264 moving image compression-coding device

The image decoding apparatus and the image decoding method according to one aspect of the present invention have a configuration for storing an image decoded in the past as a reference picture into a frame memory, in a field structure in which top lines in the reference picture are stored in a top area and bottom lines in the reference picture are stored in a bottom area, in order to use a part of the image decoded in the past as a reference block in a picture being presently decoded; and selectively copying and storing an uppermost top line or an uppermost bottom line in the reference picture to areas on the uppermost top line and the uppermost bottom line in the reference picture in the top area and the bottom area in the frame memory, and selectively copying and storing a lowermost top line or a lowermost bottom line in the reference picture to areas under the lowermost top line and the lowermost bottom line in the reference picture in the top area and the bottom area in the frame memory.

Image decoding apparatus and image decoding method

An image decoding apparatus having: a table selection controller configured to output a syntax selection signal which selects one of a prefix, a suffix, and a syntax; a variable length code decoding device configured to receive a bit stream, the syntax selection signal, and a suffix length, and, by using data contained in the bit stream and the suffix length, simultaneously decode the prefix and the suffix and output the result if the syntax selection signal selects the prefix 1 and the suffix, and decode the syntax and output the result if the syntax selection signal selects the syntax; a level formation device configured to receive the decoded prefix, the decoded suffix, and the decoded syntax, and form and output a level; and a suffix length updating device configured to receive the decoded prefix, the decoded suffix, and the decoded syntax, and update the suffix length.

Image decoding apparatus and decoding method

An image coding apparatus includes a variable length coding section, an arithmetic coding section and a common buffer memory. The variable length coding section inputs image data and outputs a binarized code sequence applied with variable length coding. The arithmetic coding section applies arithmetic coding to the binarized code sequence outputted from the variable length coding section. The common buffer memory transmits and receives data between the variable length coding section and the arithmetic coding section.

Image coding apparatus and method thereof

When a combination between a plurality of FIFO memories and a variable length coding table is used, a load generated by an increase in number of FIFO memories serving as output destinations of a codeword length output from the variable length coding table when the codeword length is output is reduced. A variable length code decoding apparatus includes an input unit which receives variable length coding data, a plurality of FIFO memories which store the variable length coding data and output or update the variable length coding data on the basis of a codeword length of the variable length coding data, a FIFO input selecting unit which outputs the variable length coding data to one of the plurality of FIFO memories, a variable length coding table storing unit which stores a variable length coding table representing a relationship between the variable length coding data, the codeword length and a decoding value, reads the variable length coding data stored in one of the plurality of FIFO memories, and compares the read variable length coding data with the variable length coding table, a table selecting unit which determines the codeword length and the decoding value on the basis of a comparison result of the variable length coding table storing unit, and outputs the determined codeword length to one of the plurality of FIFO memories, and a control unit which selects one of the plurality of FIFO memories as a destination FIFO memory, reads the variable length coding data from the input unit or one of the unselected FIFO memories, and controls the FIFO input selecting unit such that the read variable length coding data is output to the selected FIFO memory.

Variable length code decoding apparatus and variable length code decoding method

An image input unit inputs a plurality of images in a time series. Each input image includes a boundary line extending toward a vanishing point on a plane. A reverse projection image generation unit generates a reverse projection image of each input image by projecting information related to each input image onto the plane. A boundary line detection unit detects the boundary line from the reverse projection image by identifying a boundary line candidate on each reverse projection image.

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Kawasaki, Japan

Hiromitsu Nakayama