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Defect Report Number: 8632-1/045
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Submitter: Henderson
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Addressed to: JTC1/SC 24/WG 6 Rapporteur Group on ISO/IEC 8632, CGM
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WG secretariat: NNI
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Date Circulated by WG secretariat: 1 January 1995
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Deadline on response from editor: : 1 April 1995
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Defect Report concerning IS 8632:1992 Computer Graphics: Metafile for the storage and transfer of picture description information (CGM) Part 1, Functionalspecification.
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Qualifier (e.g. error, omission, clarification required): Clarification.
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References in document (e.g. page, clause, figure and/or table numbers):p.187, 2nd paragraph from bottom.
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Nature of defect (complete, concise explanation of the perceived problem):
The last sentence of this paragraph is correct for indexed Colour Selection Mode, but fails to state the result for direct colour.
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Solution proposed by the submitter (optional):
Replace the last sentence of the paragraph with: "The bitstream consists of consecutive packets of n+m bits, where the first n bits specify the run length and the remaining m bits specify the cell colour. The value of m depends upon whether the Colour Selection Mode is indexed or direct, and depends as well on the colour model in the latter case. If k is the effective cell colour precision (see the description of the cell colour precision parameter), expressed in bits, then m=k for indexed colour selection, and m=3k or m=4k for direct colour selection."
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Editor's response (any material proposed for processing as a technical corrigendum to, an amendment to, or a commentary on the International Standard or DIS final text is attached separately to this completed report):
Amend the standard as proposed above.
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