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- W1982156998 abstract "In this paper, we demonstrate an effective unified framework for high-accuracy approximation of the irrational co-effcient floating-point IDCT by a single integer-coeffcient fixed-point architecture. Our framework is basedon a modified version of the Loeffler's sparse DCT factorization, and the IDCT architecture is constructedvia a cascade of dyadic lifting steps and butterflies. We illustrate that simply varying the accuracy of theapproximating parameters yields a large family of standard-compliant IDCTs, from rare 16-bit approximationscatering to portable computing to ultra-high-accuracy 32-bit versions that virtually eliminate any drifting effectwhen pairing with the 64-bit floating-point IDCT at the encoder. Drifting performances of the proposed IDCTsalong with existing popular IDCT algorithms in H.263+, MPEG-2 and MPEG-4 are also demonstrated." @default.
- W1982156998 created "2016-06-24" @default.
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- W1982156998 date "2007-09-13" @default.
- W1982156998 modified "2023-09-23" @default.
- W1982156998 title "From 16-bit to high-accuracy IDCT approximation: fruits of single architecture affliation" @default.
- W1982156998 doi "https://doi.org/10.1117/12.740216" @default.
- W1982156998 hasPublicationYear "2007" @default.
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