Packetizer

H.264 Support in H.323 (Q117)


The information in this article applies to: H.323, H.245, H.264

ITU-T Recommendation H.264 is supported in H.323 systems using the "generic video capabilities" defined in H.245. Signaling support for H.264 is described in ITU-T Recommendation H.241 ("Extended video procedures and control signals for H.300-series terminals").

As per H.241, the H.264 capability is identified in H.245 by the object identifier "{itu-t(0) recommendation(0) h(8) 241(241) specificVideoCodecCapabilities(0) h264(0) generic-capabilities(1)}". There are several collapsing parameters also defined:

Parameter ID Parameter Name
1 Profile
2 Level
3 CustomMaxMBPS
4 CustomMaxFS
5 CustomMaxDPB
6 CustomMaxBR&CPB