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1. WO2020109496 - MULTICAST TO UNICAST CONVERSION

Publication Number WO/2020/109496
Publication Date 04.06.2020
International Application No. PCT/EP2019/082956
International Filing Date 28.11.2019
IPC
H04L 29/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
29Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/-H04L27/136
02Communication control; Communication processing
06characterised by a protocol
CPC
H04L 65/4076
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
40Services or applications
4069Services related to one way streaming
4076Multicast or broadcast
H04L 65/4084
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
40Services or applications
4069Services related to one way streaming
4084Content on demand
H04L 65/605
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
60Media handling, encoding, streaming or conversion
601Media manipulation, adaptation or conversion
605intermediate
H04L 65/607
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
60Media handling, encoding, streaming or conversion
607Stream encoding details
H04L 65/608
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
60Media handling, encoding, streaming or conversion
608Streaming protocols, e.g. RTP or RTCP
Applicants
  • BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY [GB]/[GB]
Inventors
  • TURNBULL, Rory
  • STEVENS, Timothy
Agents
  • BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, INTELLECTUAL PROPERTY DEPARTMENT
Priority Data
18209655.230.11.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MULTICAST TO UNICAST CONVERSION
(FR) CONVERSION AMÉLIORÉE DE MULTIDIFFUSION EN MONODIFFUSION
Abstract
(EN)
Presented are methods for converting a multicast media stream to unicast segments, for delivery over generic IP networks such the Internet. The unicast segments can be converted back again to a multicast stream that is identical to the original multicast stream closer to the consuming client device. Information required to regenerate a multicast stream from the generated unicast segments that is identical to the original multicast stream is also encoded into the file name of the generated unicast segments. Additionally, RTP header information from the multicast stream that is not required when the unicast segments are generated are stored in files linked to the generated unicast segments, enabling the multicast stream that is regenerated to be identical to the original multicast stream even at the RTP level.
(FR)
L'invention concerne des procédés pour convertir un flux multimédia de multidiffusion en segments de monodiffusion, pour une distribution sur des réseaux IP génériques tels que l'Internet. Les segments de monodiffusion peuvent être reconvertis en un flux de multidiffusion qui est identique au flux de multidiffusion d'origine plus proche du dispositif client consommateur. Des informations requises pour régénérer un flux de multidiffusion à partir des segments de monodiffusion générés qui sont identiques au flux de multidiffusion d'origine sont également codées dans le nom de fichier des segments de monodiffusion générés. De plus, des informations d'en-tête RTP provenant du flux de multidiffusion qui n'est pas pas requis lorsque les segments de monodiffusion sont générés sont stockées dans des fichiers liés aux segments de monodiffusion générés, ce qui permet au flux de multidiffusion qui est régénéré d'être identique au flux de multidiffusion d'origine même au niveau RTP.
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