Koninklijke Kpn N.v.

Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Robert Koenen

Mattijs Oskar Van Deventer

Hans Maarten Stokking

Omar Aziz Niamut

Emmanuel Thomas

Andries Pieter Hekstra

John Gerard Beerends

Martin Prins

Hendrikus Nathaniël Hindriks

Franciscus Elisabeth De Caluwe

A method is described for forming output video frames by a decoder device, comprising: receiving a bitstream comprising bitstream parts representing encoded media data of video tiles and tile positioning information associated with the encoded video tiles; extracting tile positioning information from the bitstream, the tile positioning information comprising tile identifiers for identifying encoded video tiles, a tile identifier being associated with one or more boundary identifiers, each identifying a boundary of a video tile identified by a tile identifier; determining a tile map based on the boundary identifiers, the tile map representing a spatial layout of video tiles in an output video frame; and forming an output video frame, including identifying parts of the bitstream representing encoded media data of video tiles identified in the tile map, decoding the identified encoded media data and copying the decoded media data in the output video frame buffer according to spatial layout.

System and methods for video encoding and decoding

Systems and methods for video encoding and decoding

A method of forming a video signal by a decoder device is described wherein the method comprises receiving a bitstream and decoder information, the decoder information signaling the decoder device the presence of one or more resolution components in the bitstream for forming a video signal, a resolution component representing a spatially subsampled version, preferably a polyphase subsampled version, of a first video signal having a first resolution, the one or more resolution components being part of a resolution component group, the group comprising a plurality of resolution components on the basis of which the first video signal is reconstructable; and, the decoder device parsing the bitstream and decoding the one or more resolution components into video frames on the basis of the decoder information.

Spatial scalable video coding

A method of and an arrangement for obtaining quality indicators for an objective assessment of a degraded or output video signal with respect to a reference or input video signal. The strength of edges or signal transitions in both the input and the output video signals are calculated to provide input and output edge signals. By processing the edge signals, introduced edges and omitted edges in the output edge signal are established. For each of the luminance and chrominance signals of a color video signal first and second quality indicators are obtained from normalized values of the introduced edges and omitted edges, relative to the output edge signal and the input edge signal normalized by first and second normalization factors, respectively. By using smeared Sobel filtering, correlation of calculated MOS and observed MOS by human test persons reaches a value of above 0.9.

Method and arrangement for objective assessment of video quality

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Rotterdam, Netherlands

Robert Koenen