QVidium QVSD - Manual (Page 43)

User‟s Manual v.3 QVidium
®
QVSD H.264 SD Video Codec™
Copyright 2011 QVidium
®
Technologies, Inc.Page 43 of 53
Network Parameters
The fields below relate to Ethernet/IP video transport settings.
IP Transport: This selects the type of video IP packet encapsulation and error correction
used by the codec in generating a Video/IP stream. All packetized video transport
mechanisms encapsulate a multiplexed variable bit rate MPEG-2 transport stream.
ARQ uses QVidium’s patented error correction mechanism based on a time-
constrained selective packet retransmission algorithm, in place of FEC. It also
encapsulates the video as per COP3.2 (without the FEC) and RFC 2733. However
it relies upon an upstream channel on UDP port 7020.
RTP disables all error correction mechanisms, but still encapsulates the MPEG-2
multiplexed data according to RFC2733.
UDP is similar to the RTP transport above, but does not add the RTP header to the
UDP packets. Instead it simply encapsulates the MPEG-2 transport stream data
directly into the UDP/IP packet payload.
Destination IP Address or Hostname: This specifies the IP address or Hostname for the
Video/IP stream.
UDP Port: This specifies the UDP port number (P), base 10, for the Video/IP stream.
TS packets per IP packet: This field allows specification of the number of 188-byte
MPEG-2 Transport Stream packets per IP packet. The standard MTU for Ethernet packets
permits a maximum of 7 TS packets per IP packets, which is the default.
ARQ
The parameters below ONLY pertain to ARQ error correction. They will be ignored when
ARQ IP Transport is not selected.
ARQ Port: By default, ARQ normally sends upstream retransmission request packets on
UDP port 7020. You can change this ARQ Port setting to any valid and non-conflicting
UDP port. However, you must make certain that you specify the same port number at both
the encoder and the decoder.