Telefonaktiebolaget Lm Ericsson (publ)

Joel Askelöf

Kristofer Dovstam

Rickard Sjöberg

Jacob Ström

Henric Axelsson

The invention teaches a method of positioning a first image having a first image format into a second image comprising multiple image blocks and having a second image format. A straight boundary of at least one image block in the second image is identified. The first image is positioned into the second image by aligning an edge of the first image with the identified straight boundary. Alternatively, a block row or column of the first image can be aligned with the straight boundary but then in such a way that an edge of the first image parallel to the block row or column is aligned with a boundary of a row or column of image blocks in the second image. This image positioning reduces any bleeding artifacts and the number of bits required for representing the image during encoding.

Resizing video and aligning video image edges to block boundaries and picture boundaries

The invention relates to media management and combats media degradations arising when transcoding the media. The invention solves this by&#x2014;generating processing hints based on the media transcoding. The hints are employed for controlling a post-transcoding processing of the transcoded media content in connection with rendering the media. The hints and this controlled processing increases the user-perceived quality when rendering the media by mitigating the media degradations caused by the transcoding. The processing hints could specify how the actual transcoding was performed by including values of the employed transcoding parameters or information of the alterations to the media caused by transcoding. Furthermore, instructions or commands for appropriate post-transcoding processing could also be processing hints according to the invention.

Media content management

In an image scaling method, an image () having an original row/column resolution Nis scaled into a scaled image () having a target row/column resolution N. A filter set comprising &#x3b1; filters is provided, where &#x3b1; being equal to a quotient of the target resolution Nand a common denominator k of the original resolution Nand the target resolution N. The common denominator k is a positive number larger than one. For at least one row/column () of image elements (), a filtered image element () of the scaled image () is formed, for each filter in the filter set, by filtering at least one image element () of the at least one row/column () using the filter. This image element formation is repeated up to k times over the at least row/column () to form a scaled row/column () of image elements () of the scaled image ().

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Stockholm, Sweden

Joel Askelöf