Fast multiplication-free QWDCT for DV coding standard
A. Silva, P. Gouveia, António Navarro · IEEE Transactions on Consumer Electronics · 2004
This paper deals with fast computation of some operations included in the digital video (DV) coding standard. The proposed solution converts floating-point arithmetic operations into integer arithmetic operations, replacing highly computational demanding blocks such as discrete cosine transform (DCT), weighting (W) and quantization (Q) by fast integer calculations using only shifts and additions. The overall computational complexity was reduced by 73% in comparison to a floating-point implementation. Our solution is suitable to be programmed into any fixed-point arithmetic processor decreasing the consumer equipment cost. This solution is still compatible with the standard in terms of the DCT precision requirements.