METHOD AND ARRANGEMENT FOR CODING TRANSFORM COEFFICIENTS IN PICTURE AND/OR VIDEO CODERS AND DECODERS AND A CORRESPONDING COMPUTER PROGRAM AND A CORRESPONDING COMPUTER-READABLE STORAGE MEDIUM

摘要

The present invention describes a method and an arrangement for coding transform coefficients in picture and/or video coders and decoders and a corresponding computer program and a corresponding computer-readable storage medium, which can particularly be employed as a novel efficient method for binary-arithmetic coding transform coefficients in the field of video coding.;For this, it is suggested that, for blocks of (video) pictures containing significant transform coefficients, coding of the transform coefficients takes place in such a way that, for each block in a scan process, the positions of significant transform coefficients in the block and subsequently, in a reverse scan order—starting from the last significant transform coefficient within the block—the values (levels) of the significant transform coefficients are determined and coded.

主权项

1. A non-transitory computer readable medium having stored thereon a computer program, enabling a computer, after having been loaded into the memory of the computer, to perform a method for coding transform coefficients
wherein for blocks of (video) pictures containing significant transform coefficients, the coding of transform coefficients takes place in such a way that, for each block, a significance mapping is arithmetically coded, the significance mapping specifying the positions of significant transform coefficients in the block in a scan order, the coding of the significance map comprising coding, in the scan order, —except for the last scan position in the scan order—a one-bit symbol (SIG) for each coefficient of the block and a one-bit symbol (LAST) for each significant coefficient of the block, wherein (SIG) serves for identifying significant coefficients and (LAST) indicates whether there are further significant transform coefficients in the block, and subsequently,
in a reverse scan order—starting with the last significant transform coefficients within the block—the values (levels) of the significant transform coefficients are arithmetically coded.