Method and device for decoding a digital video stream in a digital video system using dummy header insertion
AssigneeThomson Licensing
InventorsFranck Abelard, Philippe Leyendecker
Life of this patent
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Abstract
Method and device for decoding a packetized data stream comprising packets, a packet comprising a header and a payload, an elementary stream being encapsulated as payload in the packets. The inventive method comprises the steps of: selecting an object header in the elementary stream; inserting a packetized data stream packet header before said object header; transferring the inserted packet header, the object header and data of the packetized data stream consecutive to the object header to a packetized data stream parser. Application to digital video systems, in particular digital television decoders.
Claims12
Method for decoding a packetized data stream comprising packets, a packet comprising a header and a payload, an elementary stream being encapsulated as payload in the packets,
- said method comprising the steps of:
- selecting an object header in the elementary stream;
- inserting a packetized data stream packet header before said object header;
- transferring the inserted packet header, the object header and data of the packetized data stream consecutive to the object header to a packetized data stream parser.
Method for decoding a transport stream encapsulating a packetized data stream comprising packets, a packet comprising a header and a payload, an elementary stream being encapsulated as payload in the packets,
- said method comprising the steps of:
- selecting an object header in the elementary stream;
- inserting a transport stream packet before the transport stream packet containing the object header, said inserted transport stream packet comprising a packetized data stream header;
- transferring the inserted transport stream packet followed by the transport stream packet containing the object header to a transport stream demultiplexer followed by a packetized data stream parser.
Digital video decoding device comprising:
- a mass storage device for storing a digital video stream having packetized elementary stream format;
- a video decoding circuit adapted to receive packetized elementary stream format data;
- a circuit for locating an object header in an elementary video stream encapsulated in said digital video stream, for transferring to the decoder a part of the elementary stream starting from said object header and for inserting a dummy packetized elementary stream packet header in front of said object header before said transfer.
Digital video decoding device comprising:
- a mass storage device storing a digital video stream having transport stream format;
- a video decoding circuit adapted to receive transport stream format data;
- a circuit for locating an object header in an elementary video stream encapsulated in said digital video stream, for transferring, to the decoder, the transport stream starting at the transport stream packet containing the elementary stream packet containing the object header and for inserting a transport stream packet before the transport stream packet containing the object header, said inserted transport stream packet comprising a packetized data stream header.
Dependencies are inferred from the claim text.