Summary

Recommendation ITU-T J.297 specifies requirements and functional specifications for 4K cable set top boxes (STBs) that enable 4K ultra-high definition television (UHDTV) service reception over cable networks, and considers the compatibility and differences with the existing 2K cable STB.

The Recommendation was revised in 2018 mainly to add the multiplex method for type length value (TLV) and channel bonding in the functional specification section, as well as a new high dynamic range (HDR) function for 4K ultra-high definition services.