Library Automation and Digital Archive
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Fakultas Ilmu Komputer
Universitas Indonesia

Pencarian Sederhana

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Call Number SEM-368
Collection Type Indeks Artikel prosiding/Sem
Title A Comparative Study on Video Coding TEchnques with Compressive Sensing
Author Ida Wahidah , Andriyan Bayu Suksmono , Tati Latifah R. Mengko;
Publisher Proceedings on the 2011 international conference on electrical engineering and informatics July 17-19 2011vo. 3 (Bandung Indonesia)
Subject
Location
Lokasi : Perpustakaan Fakultas Ilmu Komputer
Nomor Panggil ID Koleksi Status
SEM-368 TERSEDIA
Tidak ada review pada koleksi ini: 46039
Comporessive sensing metho was proved to be able to perform lower sampling rate than the Nyquist rate yet maintaining good reconstruction quality. In this paper, we present the utilization of compressive sampling to encode video signal efficiently and compare the results with existing video coding standard, i.e. MPEG-4. A frame is first divided into blocks of identical size, and then a sparsity transform is employed to represent the block in a sparser domain. After that, the coefficients will undergo projection transform in order to reduce the data size according to a preset measuremet rate. For a more prominent compression ratio, we can apply lower measurement rate. However, this rate also has to comply with the sparsity level of the signal. At the decoder side, a reconstruction algorithm will be conducted by means of basis pursuit or L1 minimization to guarantee acceptable accuracy. A greater compression factor can be achieved by integrating the motion compensation and estimation techniques with compressive sensing. Inter-frame coding will decrease the number of significant coefficients, hence enchancing the sparse property. For slow motion video, we need fewer reference frames. The group-of-picture size can be made adaptive, i.e. depending on current error level reported by a feedback link frm decoder. Principally, the main difference between compressive video sensing and existing video coding is the use of projection matrix to simple the coefficients randomly. After sparsification and projection, the signal may experience subsewuent proccesses, such as quantization, run- length coding, as well as entropy coding.