Abstract: Methods and devices are provided to encode and decode a data stream carrying data representative of a three-dimensional scene, the data stream comprising color pictures packed in a color image; depth pictures packed in a depth image; and a set of patch data items comprising de-projection data; data for retrieving a color picture in the color image and geometry data. These data are inserted in the video track of the stream with associated temporal information. The color and depth pictures that are repeated at least two times in a sequence of patches are not packed in the images but inserted in the image track of the stream and are pointed by color or geometry data.

Abstract: Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.

Abstract: Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.

Abstract: A method and device for encoding data representative of a 3D scene into a container and a corresponding method and device for decoding the encoded data are disclosed.

Abstract: Methods and devices are provided to encode and decode a data stream carrying data representative of a three-dimensional scene, the data stream comprising color pictures packed in a color image; depth pictures packed in a depth image; and a set of patch data items comprising de-projection data; data for retrieving a color picture in the color image and geometry data. These data are inserted in the video track of the stream with associated temporal information. The color and depth pictures that are repeated at least two times in a sequence of patches are not packed in the images but inserted in the image track of the stream and are pointed by color or geometry data.

Abstract: The invention concerns the exchange of parameters between communication devices of a network describing their respective data sessions and the application, at a communication device, of a bandwidth distribution algorithm using the exchange parameters to allocate bandwidth to one or more data sessions in the network.

Abstract: The present principles relates to a method and a device for encoding the colors of a point cloud wherein the method comprises: —assigning a specific number (LNk) per leaf node of an octree-based structure representing the geometry of the point cloud, a specific number (LNk) being assigned to a leaf node by assigning, recursively, an orientation ({?0, . . . , ?7}) (201) and a local number ({n0, . . . , n7}) (202) to each of eight child nodes of said octree-based structure according to an orientation (?p) previously assigned to a parent node and according to a specific child node numbering order; —ordering (200), the points of the point cloud by scanning the leaf nodes of the octree-based structure according to said assigned specific numbers; —assigning (210) colors of ordered points of the colored point cloud to pixels of an image according to a specific 2D path; and—encoding (220) the image. The present principles also relates to a method and device for decoding a point cloud.

Abstract: A method of transmitting media data and display composition data for rendering the media data on a display region is described. In the method, the display composition data defines the spatial and/or temporal relationship between one or more media entities of the media data, the display region being composed of one or more display sub-regions. The method also includes the steps of transmitting display modification data, for a respective display region and/or a respective display sub-region, the display modification data indicating how the visual configuration of the respective display region or display sub-region may be modified by a user.

Abstract: The invention concerns providing for each media package a plurality of spatial composition datasets defining the initial spatial rendering of the media entities of the media package and for each spatial composition datasets a plurality of temporal composition datasets. The invention may be applied to MMT data.

Abstract: To compress headers efficiently, headers may be differentially encoded. In one embodiment, a difference between a current field and a reference field can be used in a reduced header. In another embodiment, the least significant bits of the current field can be used to represent the current field. When such a field is received, the most significant bits of a reference field are needed to de compress the field. In addition, the present principles determine the typical usage scenarios that may benefit from header compression and further determine that some fields can be removed in a reduced header or be represented by fewer bits. Header compression may impose constraints on the representation of the current field. The present principles recognize constraints on using reduced headers and provide rules and guidelines on applying header compression.

Abstract: The invention concerns the exchange of parameters between communication devices of a network describing their respective data sessions and the application, at a communication device, of a bandwidth distribution algorithm using the exchange parameters to allocate bandwidth to one or more data sessions in the network.

Abstract: Network equipment for establishing a manifest to be provided to a requesting terminal configured to receive a multimedia content divided into segments from a network equipment, each segment being available in one or more representations, said manifest listing available representations for the multimedia content and specifying a plurality of adaptation sets, each adaptation set defining a spatial object of the multimedia content, the spatial objects of the adaptation sets defining a whole spatial object is described. The network equipment includes at least one memory and at least one processing circuitry configured to define, in the manifest, a type of mapping of the multimedia content to the whole spatial object and a point of reference in one adaptation set of reference amongst the adaptation sets, and associate depth information with each adaptation set.

Abstract: The invention concerns providing for each media package a plurality of spatial composition datasets defining the initial spatial rendering of the media entities of the media package and for each spatial composition datasets a plurality of temporal composition datasets. The invention may be applied to MMT data.

Abstract: When layered coded content is transmitted over a fixed capacity network link, bitrate peaks may occur at similar time instances at the base layer and enhancement layer. To more efficiently use the bandwidth, the present principles propose different methods, such as adding a delay to a base layer bit stream or an enhancement layer bit stream, and shifting an “over-the-limit” portion of bits by a time window. At the receiver side, the present principles provide different channel change mechanisms to allow a user to change channel quickly even given the delay added in the bit streams. In particular, a decoder can start rendering the base layer content, without having to wait for the enhancement layer to be available. In one embodiment, the decoding of the base layer content is slowed down in order to align in time with the enhancement layer content.

Abstract: A method of transmitting media data and display composition data for rendering the media data on a display region is described. In the method, the display composition data defines the spatial and/or temporal relationship between one or more media entities of the media data, the display region being composed of one or more display sub-regions. The method also includes the steps of transmitting display modification data, for a respective display region and/or a respective display sub-region, the display modification data indicating how the visual configuration of the respective display region or display sub-region may be modified by a user.

Abstract: The present invention concerns a method of transferring content from a first communication device to a second communication device in a communication network, comprising the following steps: defining a first probability, according to which a content can be encoded; defining a second probability, according to which a content can be chosen; upon request of content from said second communication device to said first communication device: encoding content with another content according to said first probability, said content being chosen with said second probability, and transferring content z=x XOR y from said first communication device to said second communication device, or according to probability 1?pe transferring unencoded content x from said first communication device to said second communication device.

Abstract: To compress headers efficiently, headers may be differentially encoded. In one embodiment, a difference between a current field and a reference field can be used in a reduced header. In another embodiment, the least significant bits of the current field can be used to represent the current field. When such a field is received, the most significant bits of a reference field are needed to decompress the field. In addition, the present principles determine the typical usage scenarios that may benefit from header compression and further determine that some fields can be removed in a reduced header or be represented by fewer bits. Header compression may impose constraints on the representation of the current field. The present principles recognize constraints on using reduced headers and provide rules and guidelines on applying header compression.

Abstract: A method and apparatus are described for protecting real time media including receiving media packets, generating media bit strings from the media packets, applying a forward error correcting code across the generated media bit strings to generate at least one forward error correcting bit string and generating at least one forward error correcting packet from the at least one forward error correcting bit string. Also described are a method and apparatus for recovering from losses of real time media packets including forming media bit strings from received media packets, forming forward error correcting bit strings from received forward error correcting packets, decoding the formed media bit strings and forward error correcting bit strings to obtain recovered media bit strings and recover lost media packets from the recovered media bit strings. Further described is a data structure for a forward error correcting header on computer readable media.

Abstract: The invention enables a standard client according to the DVB-IPI phase 1 standard and connected within a local area network interconnected with a service delivery network via a non-transparent gateway to discover all the services offered to it both by the external delivery network an d by the servers in its local area network. The invention is based mainly on a service discovery aggregation functionality that we call “SD & S proxy” implemented on any one of the devices connected to the local area network running jointly with an ad-hoc configuration of the gateway.

Abstract: Method for transmission of images comprising: a reception of a source digital image comprising padding lines and data lines, the data lines comprising ancillary data and video data. In order to optimise the use of a transmission channel, the method also comprises: a filtering of padding lines to form sets of data comprising ancillary data and video data; a cutting of the sets into fragments of a maximum fragment length that is a function of a maximum transport packet length; an insertion of at least one image number in each of the fragments, each of the ancillary data and video data being associated with this number; an insertion of fragments into transport packets; and a transmission of the transport packets according to an internet protocol. The invention also relates to a corresponding method for reception.