Canon Kabushiki Kaisha

Naël Ouedraogo

Franck Denoual

Frédéric Maze

Jean Le Feuvre

Jonathan Taquet

Guillaume Laroche

Patrice Onno

Hervé Ruellan

Cyril Concolato

Youenn Fablet

Fabrice Le Leannec

Eric Nassor

Romain Bellessort

Masahiko Takaku

Benoit Vandame

Xavier Henocq

Hervé Le Floch

Lionel Tocze

Tomoya Sakai

A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. The bitstream comprises a picture header comprising syntax elements to be used when decoding one or more slices, and a slice header comprising syntax elements to be used when decoding a slice. In the picture header at least one syntax element indicating whether a decoding tool may be used in the picture. When the decoding tool is used in the picture, at least one APS ID related syntax element is parsed for the decoding tool in the picture header. The decoding also comprises parsing, in a slice header, at least one syntax element indicating whether the decoding tool is to be used or not for that slice prior to syntax elements relating to other decoding tools. A bitstream is decoded using said syntax elements.

High level syntax for video coding and decoding

A method for encapsulating media data into an ISO Base Media File Format (ISOBMFF) standard compliant file, the media data comprising a sequence of samples, including obtaining at least one sample of the sequence, generating ISOBMFF structure data indexing the at least one obtained sample, compressing the at least one obtained sample, and embedding the generated ISOBMFF structure data and the compressed at least one sample within the ISOBMFF compliant file.

Methods and devices for improving storage and transmission of uncompressed data while using a standard format

The invention relates to providing default constructors to be used by reference in extractors of an extractor tracks in order to reduce the size of the extractor track when a same constructor is used in different extractors.

Method, device, and computer program for encapsulating media data into a media file

There is provided a method of encapsulating an encoded bitstream representing one or more images, the encapsulated bitstream comprising a data part and a metadata part. The method comprises:

Image data encapsulation

At least one embodiment of a method for encapsulating media data as fragments, each fragment comprising metadata and media data, the metadata describing encapsulation of the media data. After having obtained second media data to be encapsulated within a second fragment and second metadata describing encapsulation of the second media data, it is determined whether some of the second metadata are identical to some of first metadata belonging to a first fragment and describing encapsulation of first media data within the first fragment. If it is the case and if the second fragment is not to be parsed independently, the second media data and a portion of the second metadata are encapsulated within the second fragment, the second fragment further comprising an indication to signal that the metadata part of the second fragment comprises only a portion of the metadata required to parse the media data of the second fragment.

Method and apparatus for optimizing media content data encapsualtion in low latency applications

A method of encapsulating media data into a media file, the method comprising: obtaining a time boundary in a time interval corresponding to the presentation duration of an original sample of the media data; duplicating the original sample into two consecutive duplicated samples separated by the time boundary, the two duplicated samples having a same data part corresponding to the data part of the original sample; generating a time adjustment indication indicating for each duplicated sample the relationship between the time interval corresponding to the presentation duration of the duplicated sample and the time interval corresponding to the presentation duration of the original sample; and encapsulating the media data comprising the duplicated samples and the time adjustment indication in the media file, the time adjustment indication being located in metadata describing the media data.

Method and apparatus for encapsulation of media data in a media file

A method of encapsulating a bitstream of encoded video data in a media file, the method comprising: obtaining the bitstream comprising a second plurality of operating points, video data in the bitstream being organized into NAL units; the bitstream being filtered from an original bitstream, the original bitstream comprising a first plurality of operating points, the first plurality of operating points comprising at least the second plurality of operating points; obtaining from the bitstream a first NAL unit describing the first plurality of operating points; obtaining form the bitstream a second NAL unit describing the second plurality of operating points; generating the media file comprising the bitstream and comprising at least one metadata structure describing the second plurality of operating points; wherein the at least one metadata structure is generated based on both the first and second NAL units.

Method and apparatus for encapsulating video data into a file

A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. The bitstream comprises a picture header comprising syntax elements to be used when decoding one or more slices, and a slice header comprising syntax elements to be used when decoding a slice. The decoding comprises in a case where information which can be signalled in the picture header or in the slice header is signalled in the picture header, a picture header is to be signalled in a slice header, permitting parsing of information which may otherwise be signalled in a slice header and a picture header, in only one of the slice header or picture header; imposing that the picture header is not in the slice header, and decoding said bitstream using said syntax elements.

There is provided a method of decoding video data from a bitstream, the bitstream comprising video data corresponding to one or more slices. The bitstream comprises a picture header comprising syntax elements to be used when decoding one or more slices, and a slice header comprising syntax elements to be used when decoding a slice, the decoding comprising: parsing the syntax elements. The method includes omitting parsing one or more syntax elements for a slice relating to use or availability of a decoding tool or parameter for that slice if one or more syntax elements are parsed that indicate that the picture contains only one slice; and decoding said bitstream using said syntax elements.

A method of processing image data for one or more image-(s), each image consisting of one or more tile(s) and being divisible into one or more image portion(s), wherein the image is divisible into one or more subpicture-(s), and the method comprises: determining one or more image portion(s) included in a subpicture; and —processing the one or more image(s) using information obtained from the determination.

Video coding supporting subpictures, slices and tiles

A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to multiple slices, wherein the video bitstream comprises a picture header; the method includes determining a coding mode for at least one slice; determining a set of syntax elements to be used for said coding mode from said picture header; and decoding said at least one slice using said determined syntax elements.

A method of decoding video data from a bitstream, the bitstream comprising video data corresponding to multiple slices, wherein the bitstream comprises a header comprising syntax elements to be used when decoding one or more slices; —wherein the decoding comprising parsing the picture header; parsing at least one APS ID related syntax element prior to syntax elements relating to decoding tools; and decoding said bitstream using said syntax elements.

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Maure de Bretagne, France

Naël Ouedraogo