EP3472951A1 - Remultiplexage déterministe et lisse de flux de transport dans des réseaux à fréquence unique - Google Patents
Remultiplexage déterministe et lisse de flux de transport dans des réseaux à fréquence uniqueInfo
- Publication number
- EP3472951A1 EP3472951A1 EP16759852.3A EP16759852A EP3472951A1 EP 3472951 A1 EP3472951 A1 EP 3472951A1 EP 16759852 A EP16759852 A EP 16759852A EP 3472951 A1 EP3472951 A1 EP 3472951A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- packets
- stream
- packet
- frame
- remux
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/02—Arrangements for relaying broadcast information
- H04H20/06—Arrangements for relaying broadcast information among broadcast stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
Definitions
- the present invention proposes a method and a device for deterministic re- multiplexing of transport streams, such as digital television signals primarily intended to be broadcast over Single Frequency Networks, SFN, made of transmitter sites synchronously transmitting on the same frequency.
- transport streams such as digital television signals primarily intended to be broadcast over Single Frequency Networks, SFN, made of transmitter sites synchronously transmitting on the same frequency.
- SFN Single Frequency Networks
- a reference service with MIP packets and NULL packets is added in the DTH streams at the head-end before broadcasting.
- This reference service provides the temporal stream structure to be used by the transmitter sites for their output SFN streams.
- Each TS packet of the received input stream is successively considered to perform the re-multiplexing, provided it has to be forwarded in the SFN.
- Given an associated timestamp of the received TS packet it is inserted, on the fly, in replacement of a NULL packet of the output SFN stream that, which NULL packet has a later timestamp T out (i), obtained from the timestamps provided by the MIP packets.
- each temporal frame as defined in the input streams is processed one after the other, thereby allowing a deterministic split of the input streams to be obtained at each transmitter site.
- the use of the same insertion scheme by the transmitter sites ensures the re-multiplexing to be fully deterministic.
- the deterministic DTT stream generator 12 inserts, in it, a reference service (in the meaning of DVBs service or MPEG programs) dedicated to convey the additional information.
- a reference service in the meaning of DVBs service or MPEG programs
- the service type for the reference service is chosen as a user-defined service type, e.g. service type equal to 6.
- a deterministic DTT stream generator 12 when a deterministic DTT stream generator 12 starts, it first waits for the PPS and the GPS time from the GPS receiver, and then computes the number of seconds since the reference date. The current value of the PCR counter may thus be inferred given the number of clk_27 pulses per second. Next, at each new pulse clk_27, the PCR counter is incremented.
- the Figure illustrates both implementations to DVB-T and DVB-T2 standards.
- update of the tables may be performed upon detecting a change in the service configuration for the SFN area.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
La présente invention propose un procédé et un dispositif de re-multiplexage déterministe de flux de transport, tels que des signaux de télévision numériques, destinés principalement à être diffusés sur des réseaux à fréquence unique. Les délimiteurs de trame DTT sont insérés dans des flux par des extrémités de tête. Les flux résultants sont reçus par les émetteurs qui font fonctionner les trames DTT l'une après l'autre. Les paquets TS pour une trame DTT actuelle sont filtrés à partir des flux d'entrée et stockés. Une fois que tous les paquets TS pour la trame DTT actuelle ont été récupérés, ils peuvent être insérés dans le flux multiplexé de sortie, dans la partie de flux correspondant à cette trame DTT, selon l'horodatage. Le procédé d'insertion déterministe appliqué est basé sur un processus de gestion de demandes permettant l'insertion lisse des paquets dans la trame DTT, afin d'insérer un nombre maximum de paquets TS récupérés dans le flux de sortie tout en satisfaisant leurs contraintes de synchronisation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2016/001129 WO2017216597A1 (fr) | 2016-06-17 | 2016-06-17 | Remultiplexage déterministe et lisse de flux de transport dans des réseaux à fréquence unique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3472951A1 true EP3472951A1 (fr) | 2019-04-24 |
Family
ID=56852298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16759852.3A Withdrawn EP3472951A1 (fr) | 2016-06-17 | 2016-06-17 | Remultiplexage déterministe et lisse de flux de transport dans des réseaux à fréquence unique |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3472951A1 (fr) |
| WO (1) | WO2017216597A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2632344T3 (es) | 2011-03-02 | 2017-09-12 | Nevion Europe As | Remultiplexación determinística para redes SFN |
| FR2978319B1 (fr) * | 2011-07-20 | 2013-07-05 | Enensys Technologies | Systeme de diffusion de programmes videos |
| FR3015739B1 (fr) | 2013-12-19 | 2017-05-26 | Enensys Tech | Procede de generation d’un marquage temporel pour une diffusion terrestre synchrone |
-
2016
- 2016-06-17 EP EP16759852.3A patent/EP3472951A1/fr not_active Withdrawn
- 2016-06-17 WO PCT/IB2016/001129 patent/WO2017216597A1/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017216597A1 (fr) | 2017-12-21 |
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Inventor name: POULAIN, LUDOVIC Inventor name: DENIAU, ERIC |
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