[M4IF Technotes] Peak error for IDCT Conformance

[Murali Babu]

Annexe A of ISO/IEC 14496-2 suggests that the accuracy
requirement for IDCT is a peak error of 2 and that
there are no other accuracy requirements. However,
ISO/IEC 14496-4 in section 4.4.2 says
"In order to claim that the IDCT transform used by the
decoder conforms to the specification of Annex A,
the IDCT transform shall comply with the IEEE Std
1180-1990 standard and pass successfully the following
test:"
Does this mean that the IDCT has to be conformant to
IEEE 1180-1990 and also pass the tests suggested in
Annexe A of ISO/IEC 14496-2. This seems to be
contradicting since the Annexe A of ISO/IEC 14496-2
clearly suggests that there are no other accuracy
requirements.
Thanks
Murali
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