Telefonaktiebolaget Lm Ericsson (publ)

Velos Media, LLC

Velos Media International Limited

Clinton Priddle

Per Fröjdh

Zhuangfei Wu

Kenneth Andersson

Rickard Sjöberg

Jonatan Samuelsson

Thorsten Lohmar

Thomas Rusert

Torbjörn Einarsson

Andrey Norkin

Jörg Huschke

Magnus Westerlund

Markus Kampmann

Frederic Gabin

Ivana Girdzijauskas

Per-Erik Brodin

Zhuangfel Wu

Stefan Ålund

Yuan Chun Wu

Per Froejdh

Methods and arrangements in a client node and a server node support a decision on decoding and playout of a certain content in the client node. The methods and arrangements relate to the determining, conveying and obtaining of information related to the characteristics (level) required for decoding and playing out the certain media content at a non-regular playout rate. The method and arrangement in the client node further relate to determining, based on the obtained information, which playout rate(s) is/are supported by the client node in regard of level. The methods and arrangements enable the client node to refrain from attempting to decode and play out of the content at a non-regular rate requiring a level which is not supported by the client node.

Method and arrangement for supporting playout of content

A picture with multiple slices is encoded by generating a coded slice representation for each of the slices. A slice flag is set to a first value for the first slice in the picture and corresponding slice flags of the remaining slices are set to a second defined value. A respective slice address is generated for each remaining slice to enable identification of the slice start position within the picture for the slice. A coded picture representation of the picture comprises the coded slice representations, the slice addresses and the slice flags. The slice flags enable differentiation between slices for which slice addresses are required and the slice per picture for which no slice address is needed to identify its slice start position.

Picture coding and decoding

Methods and arrangements for video coding are provided. In one exemplary embodiment, a method performed by a video decoder may include decoding an encoded video block based on a single index corresponding to the encoded video block and a predetermined reference picture list to obtain a decoded video block. Further, the index may represent a combination of a reference mode and one or more reference pictures associated with the predetermined reference picture list.

Method and arrangement for video coding

Supplemental processing information defining post-decoding instructions for processing decoded media content is co-organized in a file together with a pseudo-identifier of a media codec employed for encoding the media content. The co-organization trigger abortion of decoding of the media content by a legacy media terminal that does not recognize the pseudo-identifier but enables decoding of the media content by a media terminal that recognizes the pseudo-identifier to thereby enable post-decoding processing of the decoded media content using the supplemental processing information. The co-organization thereby prevents legacy media terminals that cannot use the supplemental processing information from decoding the media content and rendering the media content in a media presentation.

Provision of supplemental processing information

In a motion estimation for a group of at least one image element in a frame of a video sequence, a global motion is determined between the frame and a reference frame. Uncovered groups present in an uncovered region of the frame are identified based on the determined global motion. The global motion is assigned as motion representation for these identified uncovered groups. The assigned motion representation is useful for constructing new frames in the sequence in a frame rate up-conversion.

Motion estimation for uncovered frame regions

Metadata defining decoding and rendering instructions for media content to be co-rendered in a media presentation is divided and distributed as track fragments provided in different media container files. Track fragment adjustment information is included in at least one such track fragment in order to define rendering timing relationships between media content portions defined by the track fragments in a current media container file. The rendering timing relationships enable a correct time alignment of the playback of the media content to be co-rendered to achieve a synchronized media presentation. The track fragment adjustment information is particularly advantageous in connection with tuning in or a random access in a stream of media container files comprising fragmented metadata.

File format for synchronized media

In a method of enabling representation switching during HTTP streaming sessions in a communication system, arranging available representations into groups, providing information identifying the groups and their respective representations, and switching representation based on the provided group identify information.

Method and arrangement for representation switching in HTTP streaming

A technique for encoding and decoding data pertaining to multiple video views is presented. A method embodiment of the encoding technique comprises the steps of providing first picture stream belonging to a first view and performing a first encoding operation to encode a picture of the first picture stream. The first encoding operation is based on a single-view video codec and provides encoder state information relevant for the encoding of another picture of the first picture stream. Also provided is a second picture stream belonging to a second video view. A second encoding operation is performed to encode a picture of the second picture stream based on the single-view video codec, wherein the second encoding operation is based on the encoder state information provided by the first encoding operation. On the basis of the encoded picture of the first picture stream and encoded picture of the second picture stream, dedicated video streams are generated.

Multi-view encoding and decoding technique based on single-view video codecs

A method performed by a server of a communication network for making an HTTP media stream accessible to a client is provided. A Media Presentation Description (MPD) is generalized, such that the MPD is provided with at least one period element sequentially arranged according to a media play timeline. Each period element is provided with at least one representation such that at least one of the period elements is provided with at least two alternative representations. Each representation is provided with an ordered sequence of at least one media segment URI. Each media segment URI references at least one media segment of the HTTP media stream. The generated MPD enables a client to select representations and to acquire referenced media segments based on the selected representations.

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