摘要:
The invention relates to a method for navigation in a panoramic video sequence displayed on a user terminal. The video sequence is divided into a plurality of non-overlapping video patches each corresponding to a zone of the video sequence. The video patches required to form a zone of the panoramic video sequence to be displayed on a screen of the user terminal, called the visibility zone, are determined according to navigation commands.According to the invention, the video patches are provided to the user terminal, for one part, via a first transmission network and, for another part, via a second transmission network distinct from said first transmission network.
摘要:
The present invention relates to a reception device and a method for the processing of multimedia data flows in said device comprising an interface to a first network and an interface to a second network, said method comprising the following steps: receive, from the first network, a first flow comprising multimedia data through a first transport protocol fitted with a first data synchronization system; receive, from the second network, a second flow comprising multimedia data through a second transport protocol fitted with a second data synchronization system, said second synchronization system being based on timing references different from those of the first data synchronization system; characterized in that said first and second flows transport the same synchronization information in the payload field of the first and of the second transport protocol, said synchronization information comprising data indicating the moment from which said multimedia data must be rendered; synchronize said first and second flows by using said synchronization information; and perform a step for rendering said first and second multimedia flows.
摘要:
The invention relates to a method for navigation in a panoramic video sequence displayed on a user terminal. The video sequence is divided into a plurality of non-overlapping video patches each corresponding to a zone of the video sequence. The video patches required to form a zone of the panoramic video sequence to be displayed on a screen of the user terminal, called the visibility zone, are determined according to navigation commands.According to the invention, the video patches are provided to the user terminal, for one part, via a first transmission network and, for another part, via a second transmission network distinct from said first transmission network.
摘要:
The present invention relates to a reception device and a method for the processing of multimedia data flows in said device comprising an interface to a first network and an interface to a second network, said method comprising the following steps: receive, from the first network, a first flow comprising multimedia data through a first transport protocol fitted with a first data synchronization system; receive, from the second network, a second flow comprising multimedia data through a second transport protocol fitted with a second data synchronization system, said second synchronization system being based on timing references different from those of the first data synchronization system; characterized in that said first and second flows transport the same synchronization information in the payload field of the first and of the second transport protocol, said synchronization information comprising data indicating the moment from which said multimedia data must be rendered; synchronize said first and second flows by using said synchronization information; and perform a step for rendering said first and second multimedia flows.
摘要:
A method of decoding an audio/video content transmitted over a broadband network. The method being based on the quick decoding of the first frames of a group of pictures without rendering them if the group of pictures arrives too late to be rendered synchronously with another audio/video content received through a broadcast network. The method allowing the synchronized rendering of contents respectively received over broadcast and broadband networks as soon as possible for the viewer.
摘要:
The present invention concerns a method for reducing the channel change time in a broadcast television system by encoding a termed companion service in addition to the main service. The companion service is sent along with the original service and helps the receiver to retrieve and display the new service more rapidly during the channel change process. With this solution the service is encoded and streamed in its original format, plus encoded and streamed in a low resolution format.
摘要:
The present invention concerns a method for reducing the channel change time in a broadcast television system by encoding a termed companion service in addition to the main service. The companion service is sent along with the original service and helps the receiver to retrieve and display the new service more rapidly during the channel change process. With this solution the service is encoded and streamed in its original format, plus encoded and streamed in a low resolution format.
摘要:
The invention concerns a receiver, and a method for channel switching at the receiver, the method comprising the steps of switching to a channel transporting a program encoded into Groups of Pictures, receiving the program into a first stream and a second stream, the first stream being encoded with successive first Group of Pictures, first GoP, the second stream being encoded with successive second Group of Pictures, second GoP, each one of the second GoP corresponding to a first GoP and being a subset of the first GoP, each GoP starting with an Intra-frame picture, selecting, between the first stream and the second stream, the picture that is decoded, and displaying the picture.
摘要:
A method of decoding an audio/video content transmitted over a broadband network. The method being based on the quick decoding of the first frames of a group of pictures without rendering them if the group of pictures arrives too late to be rendered synchronously with another audio/video content received through a broadcast network. The method allowing the synchronized rendering of contents respectively received over broadcast and broadband networks as soon as possible for the viewer.
摘要:
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.