[daala] A Unified Algorithm for Subband-Based Discrete Cosine Transform (DCT)

[David ledin]

A Unified Algorithm for Subband-Based Discrete Cosine Transform (DCT)

With the advantages of the subband decomposition of a signal, a
high-efficiency algorithm with pipelined stages has been proposed for
fast DCT/IDCT computations. It is noted that the proposed DCT/IDCT
algorithm not only simplifies computation complexity but also improves
system performance. Thus, the proposed subband-based DCT/IDCT
algorithm is suitable for the real-time signal processing
applications. The proposed DCT/IDCT processor provides both high
throughput and low gate count and has been applied to various images
with great satisfactions.


http://downloads.hindawi.com/journals/mpe/2012/912194.pdf