Newtec Proprietary
Confidentiality: Unrestricted
V1.4
125/225
Data Interfaces M6100 Broadcast Satellite Modulator
RTP is restricted in using consecutive packets that are used to generate the error correcting
packets. This limits the burst correction efficiency. This is why RTP FEC is developed.
11.6.6.3 RTP FEC
This is the standard RTP protocol but it adds the possibility to insert non-consecutive packets.
These non-consecutive packets are used to generate FEC (Forward Error Correction). This FEC
information of a certain TS is inserted periodically in a parallel UDP port.
This mechanism is standardized by SMPTE.org in the standards SMPTE 2022 of
which the M6100 Broadcast Satellite Modulator supports SMPTE 2022-1 and SMPTE
2022-2. These standards support only the protection of CBR (Constant Bit Rate) TS
streams. The standards for VBR (Variable Bit Rate) TS streams are not supported.
• SMPTE-2022 used to be known by the name Pro-MPEG COP#3.
The insertion of SMPTE-2022 FEC packets is based on a two dimensional XOR (exclusive or)
algorithm.
The size of the matrix (refer to the following figure) is defined by two parameters L and D.
To Next Page
Loading...
