Context-adaptive variable length coder with simultaneous storage of incoming data and generation of syntax elements

摘要

A variable-length coding apparatus which receives image data block by block, and generates coded data from syntax elements. A storage unit temporarily stores the image data, while, at the same time, a first syntax element calculating unit calculates a first syntax element from the image data. A first coding unit generates coded data of the first syntax element from a value of the first syntax element. A second syntax element is calculated from the image data by a second syntax element calculating unit that reads out the image data stored in the storage unit. A second coding unit generates coded data of the second syntax element on the basis of the values of the first and second syntax elements, and a packing unit connects the coded data of the first and second syntax elements.

主权项

1. A variable-length coding apparatus which receives id="REI-00001" date="20141223" a block of id="REI-00001" image data id="REI-00002" date="20141223" block by block, and generates coded data from syntax elementsid="REI-00002" , comprising:
a storage unit that temporarily stores the block of image data; a first syntax element calculating unit that calculates a first syntax element from the block of image data, at the same time the block of image data is stored in saidthe storage unit; a first coding unit that generates coded data of the first syntax element from a value ofbased on the first syntax element; a second syntax element calculating unit that reads out the block of image data stored in saidfrom the storage unit, and calculates a value of a second syntax element from the block of image data which is read out from the storage unit; a second coding unit that generates coded data of the second syntax element based on the basis of the values of the first syntax element and the second syntax elementselement; and a packing unit that packs the coded data of the first syntax element and the coded data of the second syntax elementselement.