IPCM: Intra pulse-code modulation (similar in spirit to IPCM in AVC and HEVC).
JM: Joint model – the primary software codebase that has been developed for the AVC standard.
JSVM: Joint scalable video model – another software codebase that has been developed for the AVC standard, which includes support for scalable video coding extensions.
Last Call: The stage of the ITU-T "alternative approval process" that follows Consent, during which a proposed text is available on the ITU web site for consideration as a candidate for final approval.