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Deblocking is required when data rate of a video stream is low. Images taken from such video streams also contain blocking artifacts. Similarly, when the images are compressed by ICA (Independent Component Analysis) transform coding, the resultant decompressed images are blocky. This paper describes the outcome of applying deblocking filters on ICA decoded images by using two schemes namely, “deblocking...
Coding of arbitrarily-shaped image/video segments is important to achieving the object-based coding - which is a key technique in many multimedia applications. MPEG-4 suggested a low-pass-extrapolation (LPE) padding method to handle each boundary block of an arbitrary shape. In this paper, we develop a constrained quantization technique and apply it to each LPE-padded boundary block. This dasiasmartpsila...
In this brief, a new local motion estimator is proposed which can accurately estimate motion activities under varying strong brightness conditions. The proposed estimator makes use of a new block division technique which manages practically to get rid of the adverse influence caused by brightness changes between frames. We also propose a new static sprite coding system using the proposed local motion...
In this paper we present a hardware-accelerated system-on-chip implementation of an MPEG-4 simple profile video decoder with a novel hardware accelerator interfacing methodology. The system consists of a general purpose master processor and several slave hardware accelerators. The communication between the master processor and the hardware accelerators is performed without interrupts by using piecewise-static...
In the upcoming video coding standard, MPEG-4 AVC/JVT/H.264, motion estimation is allowed to use multiple references and multiple block sizes to improve the rate-distortion performance. However, full exhaustive search of all block sizes is computational intensive with complexity increasing linearly to the number of allowed reference frame and block size. In this paper, a novel search algorithm, three...
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