Systematic Approach of Fixed Point 8x8 IDCT and DCT Design and Implementation
نویسندگان
چکیده
MPEG has recently issued a CFP for voluntary fixed point 8x8 IDCT and DCT standards to ease the effort that is needed to implement the IDCT and DCT, and also to help ensure that decoders are implemented in conformance with the MPEG standard. This paper is conclusion and extension of our previous proposal responding to the CFP. A systematic approach of fixed point 8x8 IDCT and DCT design and implementation is proposed that approximate the ideal integer output IDCT and DCT with high fidelity. Performance and complexity issues such as bit width are discussed for different methods using this approach. The methods discussed in this paper can also be easily extended to IDCT and DCT with other size.
منابع مشابه
Efficient Fixed-Point Approximations of the 8x8 Inverse Discrete Cosine Transform
This paper describes fixed-point design methodologies and several resulting implementations of the Inverse Discrete Cosine Transform (IDCT) contributed by the authors to MPEG’s work on defining the new 8x8 fixed point IDCT standard – ISO/IEC 23002-2. The algorithm currently specified in the Final Committee Draft (FCD) of this standard is also described herein.
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