EVS XS - 4.2. Audio Specifications

Issue
10.03.B
XS Series DISK RECORDER
–
Version 10.03
- Hardware Technical Reference
EVS Broadcast Equipment SA
–
March 2010
18
2 ch 4 ch
NTSC
220 220
DVCPro 50
PAL
50 50
NTSC
50 50
DVCPro HD
PAL
100 100
NTSC
100 100
1.7.7 AVID DNXHD ® AND APPLE PRORES 422
INTRODUCTION
EVS XS servers feature a native implementation of the Avid DNxHD® and Apple
ProRes 422 high definition video codecs. This enables native audio and video file
transfers in either direction between the EVS XS servers, and Avid and Apple
post-production tools in High Definition. This document explains the impact of
using Avid DNxHD® and Apple ProRes codecs on XS servers, on the XNet[2] SDTI
network and on the XF[2] in terms of storage capacity, number of usable video
channels and network transfers.
For details on how to setup a direct connection between an HD XS server and an
Avid or Apple server, please refer to the specific documents
(EVS_Avid_integration or EVS_Apple_integration).
VIDEO BITRATE COMPATIBILITY WITH AVID AND APPLE
PRODUCTS
Avid DNxHD® is standardized at specific bitrates according to 2 profiles:
1. Standard profile: 120Mbps in “PAL” (50Hz) and 145Mbps in “NTSC” (59.94Hz)
2. High Level profile: 185Mbps in “PAL” (50Hz) and 220Mbps in “NTSC” (59.94Hz)
Although Avid DNxHD® is standardized at the specific bitrates mentioned here
above, Avid products can seamlessly read DNxHD® files and streams at other
bitrates. DNxHD® pictures at other bitrates than those defined by the 2 official
Avid profiles can also be referred to as “VC-3” as defined in SMPTE 1019.
To allow users to determine the best balance between picture quality, storage
capacity, number of video channels per server, and network speed, EVS XS
servers can generate Avid DNxHD® files and streams at any given bitrate between
20Mbps and 220Mbps. These files and streams should remain compatible with Avid
production tools.
Apple ProRes 422 is also standardized at specific bitrates according to 3 profiles:
1. Apple ProRes 422 (also sometimes referred to as Apple ProRes 422 SQ):
120Mbps in “PAL” (50Hz) and 145Mbps in “NTSC” (59.94Hz)
2. Apple ProRes 422 HQ: 185Mbps in “PAL” (50Hz) and 225Mbps in “NTSC”
(59.94Hz)
3. Apple ProRes 422 LT: 85Mbps in “PAL” (50Hz) and 102Mbps in “NTSC”