Ricoh Company, Ltd.

Minolta Camera Kabushiki Kaisha

Yutaka Satoh

Edward L Schwartz

Michael J Gormish

Kenjiro Ishii

Fumio Fukumoto

Hajime Otsuki

Yasuhide Kokura

Shuichi Saito

A method and apparatus for performing block sequential processing is described. In one embodiment, the apparatus comprises a determine pass logic, selection logic, next coefficient logic and control. The determine pass logic has inputs coupled to receive significance state information for a region, a pass bit for each coefficient in a subset of the region, and a current pass indication. In response to these inputs, the determine pass logic generates pass indications to indicate a pass for each coefficient in the subset of the region. The selection logic has inputs coupled to signals output from the determine pass logic and the current pass indication and, in response to these inputs, generates output indications associated with one pass of either the significance propagation, refinement, and cleanup passes. The next coefficient logic is coupled to the selection logic and indicates the next coefficient in the current pass in response to the output indications from selection logic. The control is coupled to receive the output indicating the next coefficient in the one pass and codes coefficients in the significance propagation, refinement and cleanup passes. The control also codes the next coefficient in either the significance propagation, refinement and cleanup passes as indicated by the next coefficient logic.

Method for block sequential processing

A method and apparatus for assigning codeblocks to coders operating in parallel is described. In one embodiment, the method comprises decomposing input data into a plurality of code-blocks, and assigning the plurality of code-blocks, on a code-block basis, to a plurality of MQ coders to code the plurality of code-blocks in parallel to balance, to the extent possible, an amount of coding to be performed by each of the plurality of MQ coders.

Method and apparatus for assigning codeblocks to coders operating in parallel

A wavelet transform filter is disclosed having a pair of line buffers, three pairs of high and low pass filter pairs, two pairs of cascaded delays, and first and second delays, where the second pair of cascade delays is coupled to the first output and has fourth and fifth delay outputs, and a third high pass filter element having inputs coupled to the first output and the fourth and fifth delay output, where the third high pass filter element generates a fifth output of coefficients in the HH subband. A second delay coupled to the fifth output and has a sixth delay output. A third low pass filter element has inputs coupled to the fifth output, the sixth delay output and the fifth delay output and generates a sixth output corresponding to the coefficients in the HL subband.

5,3 wavelet filter having three high pair and low pair filter elements with two pairs of cascaded delays

Parallel block MQ arithmetic image compression of wavelet transform coefficients

A method and apparatus for coding and decoding information is described. In one embodiment, the apparatus comprises a memory and decoding hardware. The memory stores run counts and/or skip counts and the decoding hardware decodes a run count and/or a skip count obtained from the memory during decoding.

Context model access to memory based on run and skip counts and context model skipping

Method and apparatus for block sequential processing

Disclosed is a reader printer having an image rotation prism for adapting the direction of a microfilm image to suitable direction. The reader-printer has an image direction detecting means for forming the microfilm image successfully onto a copy paper without consideration of the direction of the image. The reader-printer also has a prism orientation detecting means for automatically eliminating difference between a location of the image and a location of the fed paper.

Reader-printer having an image rotation device

Disclosed is a reader-printer being capable of erasing a frame surrounding margin of a microfilm and unnecessary image portion in the frame. The reader-printer comprises first flap member, second flap member which are disposed adjacent to a slit and movable in and out of a light path directing toward a photosensitive drum and a lamp to illuminate those flap members when they are moved into the light path. The first flap member is movable in the longitudinal direction along the slit for varying a shading area.

Device for erasing unnecessary images for use in reader-printers

A reader printer having an image rotation prism for adapting the direction of a microfilm image to suitable direction. The reader-printer has an image direction detecting means for forming the microfilm image successfully onto a copy paper without consideration of the direction of the image. The reader-printer also has a prism orientation detecting means for automatically eliminating difference between a location of the image and a location of the fed paper.

Growing community of inventors

Yokohama, Japan

Yutaka Satoh