Nouri Masmoudi

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In motion estimation, the search patterns with different shape and size have a large consequence on the searching speed and quality of performance. A popular example is the full search (FS) algorithm. Nevertheless, the high computational complexity of the FS algorithm has motivated several faster search strategies. However, the FS allows a better quality.(More)
Motion estimation (ME) is a key operation for video compression. In fact, it contributes heavily to the compression efficiency by removing temporal redundancies. This process is the most critical part in a video encoder and can consume itself more than 50% of coding complexity or computational coding time. To reduce the computational time, many fast ME(More)
High-efficiency video coding is the latest standardization effort of the International Organization for Standardization and the International Telecommunication Union. This new standard adopts an exhaustive algorithm of decision based on a recursive quad-tree structured coding unit, prediction unit, and transform unit. Consequently, an important coding(More)
The H.264/AVC Advanced Video Coding standard (AVC) is poised to enable a wide range of applications. However, its increased complexity creates a big challenge for efficient software implementations. This work develops and optimises the H.264/AVC video decoder level two on the TMS320C6416 Digital Signal Processor (DSP) for video conference applications. In(More)
A merging procedure joining search origin, search pattern and new variable block size motion estimation for H.264/AVC is proposed in this paper. Those approaches yield good tradeoffs between motion estimation distortion and number of computations since they invest and exploit the center-biased characteristics of the real world video sequences: A reliable(More)
In this paper, we present an efficient H.264 / AVC Intra 16×16 Frame Coder System. The System achieves realtime performance for video conference applications. The INTRA 16×16 is composed by intra 16×16 prediction, integer transform, quantization AC, inverse integer transform, inverse quantization AC, quantization DC, hadamard, inverse(More)
The high coding efficiency enabled by the H.264 standard comes with substantially greater algorithmic complexity as compared to that of existing standards. This additional complexity complicates very much the implementation and optimization tasks. However, efficient implementations on different platforms exist that achieve real-time constraints in several(More)
Iris localization is a critical step for an iris recognition system because it directly affects the recognition rates. Consequently, in order to have reasonably accurate measures, we should estimate as many iris boundaries as possible which are defined by papillary and ciliary regions. Due to the contraction which is an intrinsic propriety of the pupil and(More)
This paper discusses combined software and hardware architecture of a H. 264/AVC video compression decoder. The software version of the decoder was implemented using NIOS II processor on a FPGA board (Stratix III of Altera). The mixed, software and hardware, architecture was proposed to ameliorate the decoder speed throughputs. According to the time(More)