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Integer Inverse Transform Structure Based on Matrix for VP9 Decoder
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 Title & Authors
Integer Inverse Transform Structure Based on Matrix for VP9 Decoder
Lee, Tea-Hee; Hwang, Tae-Ho; Kim, Byung-Soo; Kim, Dong-Sun;
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In this paper, we propose an efficient integer inverse transform structure for vp9 decoder. The proposed structure is a hardware structure which is easy to control and requires less hardware resources, and shares algorithms for realizing entire DCT(Discrete Cosine Transform), ADST(Asymmetric Discrete Sine Transform) and WHT(Walsh-Hadamard Transform) in vp9. The integer inverse transform for vp9 google model has a fast structure, named butterfly structure. The integer inverse transform for google C model, unlike universal fast structure, takes a constant rounding shift operator on each stage and includes an asymmetrical sine transform structure. Thus, the proposed structure approximates matrix coefficient values for all transform mode and is used to matrix operation method. With the proposed structure, shared operations for all inverse transform algorithm modes can be possible with reduced number of multipliers compared to the butterfly structure, which in turn manages the hardware resources more efficiently.
VP9;IDCT;IADST;Inverse integer transform;Butterfly;Matrix coefficients;
 Cited by
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