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Sum of absolute differences (SAD) calculation is one of the most time-consuming operations of video encoders compatible with the high efficiency video coding standard. SAD hardware architectures employ an adder tree to accumulate the coefficients from absolute difference between two video blocks. This paper exploits different adder compressors structures into the SAD hardware architecture. The architectures...
This work proposes a Sum of Absolute Transformed Differences (SATD) architecture based on multiple sizes Hadamard Transforms (HTs) and adder compressors, where the smallest HTs are reused for the implementation of the largest ones. A new adder/subtractor compressor is proposed and used to implement additions and subtractions of the HT module, while conventional 4-2 and 8-2 adder compressors are used...
The addition is the most used arithmetic operation in Digital Signal Processing (DSP) algorithms, such as filters, transforms and predictions. These algorithms are increasingly present in audio and video processing of battery-powered mobile devices having, therefore, energy constraints. In the context of addition operation, the efficient 4-2 adder compressor is capable to performs four additions simultaneously...
Sum of Absolute Differences (SAD) is an intensive time-consuming operation of state-of-art video encoders. It is used as a block matching metric inside Motion Estimation (ME) and also on mode decision in Intra Prediction. SAD hardware architectures employ an adder tree to accumulate the coefficients from absolute difference between two video blocks. Due to the simplicity, the SAD metric is the better...
The calculation of the Sum of Absolute Differences (SAD) is one of the most time-consuming operations of the video encoder compatible with the new High Efficiency Video Coding (HEVC) standard. SAD hardware architecture employs an adder tree to accumulate the coefficients from absolute difference between two video blocks. This paper proposes the exploration of the different adder compressors structures...
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