QVidium QVMP2C-1011 - Manual (Page 41)

User’s Manual v.28 QVidium™ MPEG2+4 Codec
41 of 45 - Copyright 2007-2008 QVidium™ Technologies, Inc.
13.3 Appendix C: MPEG2+4 Codec Bitrate Limits
Decode Bitrate Limits
Bitrate limits related to receiving MPEG-2 Transport Stream video from the network:
Maximum MPEG-2 TS bitrates (MPEG-2 or MPEG-4):
• 6.5 Mbps for ARQ error correction
• 7.5 Mbps for ProMPEG FEC error correction
• 9.0 Mbps for UDP and RTP transport (no error correction)
Encode Bitrate Limits
Bitrate limits related to sending MPEG-2 Transport Stream (TS) and MPEG-2 Program
Stream (PS) video to the network. Unless noted otherwise, all bitrates below assume full
NTSC (29.9 fps) or PAL frame rates (25 fps).
Minimum bitrates assume zero audio bitrate. Selecting a non-zero audio bitrate increases
the minimum bitrate. The MPEG2+4 Codec user interface will calculate and enforce the
correct minimum for any given set of video and audio encoding parameters. The actual
minimum bitrate will be determined by the user interface. The values here are only
provided as a guideline for estimating the required network loading.
Maximum MPEG-2 TS bitrates (full pacing enabled):
• 9.0 Mbps for ARQ error correction*
• 7.5 Mbps for ProMPEG FEC error correction
• 9.0 Mbps for UDP or RTP transport (no error correction)
* When streaming to other QVidium products and software applications, including:
StreamViewer software decoder, DVB-ASI/IP Gateway, MPEG2+4 CodecPro
Minimum MPEG-2 TS bitrates for MPEG-2 and MPEG-4(SP) Encoding:
• 2.42 Mbps for 720x480 video resolution
• 1.65 Mbps for 480x480 video resolution
• 1.24 Mbps for 352x480 video resolution
• 671 Kbps for 352x240 video resolution
• 619 Kbps for 320x240 video resolution
Minimum MPEG-2 PS (Program Stream) bitrates for MPEG-2 or MPEG-4(SP) Encoding:
• 2.31 Mbps for 720x480 video resolution
• 1.54 Mbps for 480x480 video resolution
• 1.13 Mbps for 352x480 video resolution
• 564 Kbps for 352x240 video resolution
• 512 Kbps for 320x240 video resolution