Liaison statement from SC 29/WG 6 to W3C about WebCodecs

Hi Media WG participants,

W3C received a letter from ISO/IEC JTC1/SC29/WG6, also known as MPEG 
Audio Coding, that suggests adding extended HE-AAC to the AAC WebCodecs 
Registration draft note. The letter notably proposes to add "mp4a.40.42" 
(Extended HE-AAC (MPEG-D USAC + MPEG-D DRC) as defined in [ISO23003-3] 
and [ISO23003-4]) to the list of fully qualified codec strings in this 
registration note.

See the (member-only) letter for details at:
https://lists.w3.org/Archives/Member/w3c-archive/2026Mar/att-0162/ISO-IEC_JTC_1-SC_29_N23348_Liaison_statement_from_SC_29-WG_6_to_W3C_on_request_for_modifications_of_AAC_WebCodecs_registration__

Thanks,
François.

Received on Monday, 9 March 2026 18:16:42 UTC