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The Design and Optimization of Scalable Video Encoder Based on Wavelet Transform

Author: FengZuo
Tutor: LiHua
School: Tianjin University
Course: Signal and Information Processing
Keywords: Wavelet Transform Scalability encoding Dirac MMX optimized
CLC: TN762
Type: Master's thesis
Year: 2007
Downloads: 36
Quote: 0
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Abstract


The wavelet transform is a new transformation technology developed over the past dozen years , its research has covered many areas such as applied mathematics , physics and engineering technology to become one of the research focus in the field of IT . Wavelet transform reason why so much attention , mainly because it is in the time domain and frequency domain at the same time having good local in nature, but due to the high frequency components gradually fine time domain or spatial domain sampling step , which can be focused to the object any details . The main two features , one has the potential of combining with the human visual properties , which can be in the same average bit rate to get a better subjective quality of the reconstructed image ; image wavelet decomposition coefficient multiresolution characteristics , no extension of the amount of image data , which can achieve transmission of the embedded code stream . The status quo of the rapid development of multimedia services , due to the heterogeneity of network , the receiving device , the user needs to study the scalable video coding based on wavelet transform is very necessary. The paper first introduces in detail the principles of wavelet transform and scalable coding , while BBC RD based on wavelet transform of the Dirac video encoder , given it and X264 and SNOW encoder performance comparison and analysis . Then its open source code based on the improved design of a hybrid coding structure based on the combination of two-dimensional wavelet transform and motion compensation temporal and spatial encoder Scalability . Finally , the program code to optimize the use of Intel MMX instruction set , the presence of a large number of repeat operation bottleneck function optimization , to gain a more practical solution . Intel VTune Performance Analyzer 8.0 test results show significant performance improvement of the optimized code in the key function section .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Encoder
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