RFC Errata
RFC 6386, "VP8 Data Format and Decoding Guide", November 2011
Source of RFC: INDEPENDENT
Errata ID: 7519
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Nico Weber
Date Reported: 2023-05-22
Section 9.3 says:
a. L(1), the mode of segment feature data (segment_feature_mode), can be absolute-value mode (0) or delta value mode (1).
It should say:
a. L(1), the mode of segment feature data (segment_feature_mode), can be delta value mode (0) or absolute-value mode (1).
Notes:
9.3 lists the meanings of the bits the wrong way round.
Section 19.2 has it the right way round:
"""
o segment_feature_mode indicates the feature data update mode, 0 for
delta and 1 for the absolute value
"""
That is, at the moment two sections in the spec directly contradict each other. Section 19.2 is right, section 9.3 is wrong from what I can tell.