Thomson Licensing

Vincent Bottreau

Edouard Francois

Patrick Lopez

Jérôme Vieron

Christophe Chevance

Ying Hai Chen

Philippe Bordes

Ying Li

Jerome Vieron

Eric Gautier

Jean-Baptiste Henry

Edouard François

Francois-Louis Tariolle

Chen Ying

Jérome Vieron

Jéróme Vieron

Ying Chen

The invention relates to a distribution method for a multimedia stream multiplexed via a network, the multiplexed multimedia stream comprising multimedia and signalling components, the components being divided into elementary packets of the multiplexed multimedia stream transmitted on at least one transport channel of the network. This method comprises a step of selection of elementary packets of the multiplexed multimedia stream incorporated in transport packets, wherein each of the elementary packets of the signalling components are incorporated in transport packets transmitted on a first of the at least one transport channel, and wherein others transport packets comprising at least one elementary packet and a part only of the multimedia components, are transmitted on a transport channel. This method further comprises a step of transmission of transport packets on each of the transport channels, comprising a step of definition of a first sequence number for each of the transport packets of each of the transport channels and a second sequence number for each of the elementary packets, the first sequence number being incremented for each of the transport packets, independently on each of the transport channels, the second sequence number being incremented for each of the elementary packets.

Distribution of MPEG-2 TS multiplexed multimedia stream with selection of elementary packets of the stream

The invention relates to a method for reception of video contents and services streamed or broadcast by a television operator towards a multitude of reception devices, the encoded video contents and services being split into a first data stream and a second data stream, comprising a step for receiving the first data stream streamed or broadcast in a first transport session, a step for receiving the second data stream transmitted in a second transport session, the second data stream being transmitted prior to the first data stream and the second data stream not being able to be decoded without the first data stream, a step for recording the second data stream in a storage means of the device, a step for continuously synchronizing the second data stream with the first data stream into a stream being sent to the decoding means.

Method and device for reception of video contents and services broadcast with prior transmission of data

The invention relates to a method for deriving motion data for a macroblock divided in elementary blocks of a high resolution picture, called high layer macroblock, from motion data of macroblocks of a low resolution picture, called base layer macroblock. The method comprises the following steps:

Method for deriving motion for high resolution pictures from motion data of low resolution pictures and coding and decoding devices implementing said method

The invention relates to a method for generating for at least one block of pixels of a picture of a sequence of interlaced pictures at least one motion predictor and at least one texture predictor from motion data, respectively texture data, associated with the pictures of a sequence of low resolution interlaced pictures.

Method of predicting motion and texture data

A method for generating for at least one block of pixels of a picture of a sequence of progressive pictures at least one motion predictor and at least one texture predictor from motion data, respectively texture data, associated with the pictures of a sequence of low resolution interlaced pictures.

The invention relates to a method for generating for at least one macroblock of a high resolution image at least one motion predictor from motion data associated to macroblock(s) of a low resolution image. The method comprises the following steps: &#x2014;defining a virtual structure made up of non overlapping macroblocks, called virtual base layer macroblocks; &#x2014;identifying for the high resolution macroblock corresponding virtual base layer macroblocks in the virtual image on the basis of the location of the high resolution macroblock within the high resolution image and on the basis of the ratios of low resolution and high resolution images dimensions; &#x2014;deriving, for each identified virtual base layer macroblocks, motion data from motion data associated to at least one macroblock of a corresponding low resolution macroblocks pair on the basis of the field/frame mode of the corresponding low resolution macroblocks pair and on the basis of the field/frame mode of the high resolution macroblock; &#x2014;resampling motion data associated to the corresponding virtual base layer macroblocks so as to generate the at least one motion predictor.

Inter-layer motion prediction method using resampling

Methods for determining for high layer macroblocks that use inter-layer prediction, a partitioning of the macroblock. The methods include dividing the high layer macroblock in non-overlapping high layer blocks of a predefined size; determining a corresponding base layer pixel for one pixel, called reference pixel, of each high layer block; identifying, for each reference pixel, a base layer macroblock to which the corresponding base layer pixel belongs, a base layer partition to which the corresponding base layer pixel belongs in the identified base layer macroblock, a base layer sub-partition to which the corresponding base layer pixel belongs in the identified base layer partition if the sub-partition exists; deriving, for each of the high layer block, a single value, called Partlnfo value; and determining a partitioning of the high layer macroblock in macroblock partitions by comparing between them the Partlnfo values associated with each of the high layer blocks.

Simplified inter-layer motion prediction for scalable video coding

Often hierarchical bi-directionally predicted frame structures are used for encoding a video picture sequence. The frames may consist of interlacing fields. A method for encoding interlaced video, wherein inter-prediction of fields is used and reference lists are assigned to the fields for indicating reference frames or fields, comprises that, if within such reference list a reference to another frame is included, then references to both fields of the other frame are included separately in direct sequence. Further, a temporal level is assigned to each of the frames according to their display order, and for the frames of all except one temporal level the quantization parameter is higher for one type of fields than for the other type of fields.

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Chateaubourg, France

Vincent Bottreau