A Proposed Hardware Reference Model for Spatial Transformation and Quantization in H.264,
This paper presents three Very Large Scale Integration prototypes to exploit spatial redundancy in the H.264 standard. The proposed architectures are: (1) forward 4 × 4 integer approximation of DCT transform and quantization, which is applied to all blocks of a frame, (2) the 4 × 4 Hadamard transform and quantization that is applied to the DC coefficients of the luma component when the macroblock is encoded in 16 × 16 intra prediction mode, and (3) the 2 × 2 Hadamard transform and quantization that is applied to the DC coefficients of the chroma component as a second level in the transformation hierarchy. The developed algorithms are adopted by the H.264 standard. A performance analysis shows that the architectures satisfy the real-time constraints required by different digital video applications.
I. Amer, W. Badawy, G. Jullien, “A Proposed Hardware Reference Model for Spatial Transformation and Quantization in H.264,” Elsevier Journal of Visual Communication and Image Representation, Volume 17, Issue 2, April 2006, Pages 533-552.
A Simplified 8×8 Transformation And Quantization Real-Time Ip-Block For Mpeg-4 H.264/Avc Applications: A New Design Flow Approach
Current multimedia design processes suffer from the excessively large time spent on testing new IP-blocks with references based on large video encoders specifications (usually several thousands lines of code). The appropriate testing of a single IP-block may require the conversion of the overall encoder from software to hardware, which is difficult to complete in the short time required by the competition-driven reduced time-to-market demanded for the adoption of a new video coding standard. This paper presents a new design flow to accelerate the conformance testing of an IP-block using the H.264/AVC software reference model. An example block of the simplified 8 × 8 transformation and quantization, which is adopted in FRExt, is provided as a case study demonstrating the effectiveness of the approach.
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Ihab Amer, Wael Badawy, Graham Jullien, Marco Mattavelli, And Robert Turney, “A Simplified 8×8 Transformation And Quantization Real-Time Ip-Block For Mpeg-4 H.264/Avc Applications: A New Design Flow Approach,” Journal of Circuits, Systems, and Computers Vol. 16, No. 6 (2007) 1011–1026
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