FIELD: physics, computer engineering.
SUBSTANCE: invention relates to block transform-based encoding. The disclosed digital multimedia data encoder/decoder includes signalling various modes relating to computational complexity and precision during decoding. The encoder may send a syntax element indicating arithmetic precision (e.g., using 16- or 32-bit operations) of the transform operations performed during decoding. The encoder may also signal whether to apply scaling to the decoder output, which provides a wider dynamic range of intermediate data during decoding, but adds to computational complexity due to the scaling operation.
EFFECT: controlling computational complexity and precision of decoding through a digital multimedia data codec.
27 cl, 6 dwg
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