Performance comparison of discrete wavelet transform based H.264/MPEG-4 AVC (Advanced Video Coding) Video codec | |
| Author | Yeamyot Wirathepsuporn |
| Call Number | AIT Thesis no.TC-03-02 |
| Subject(s) | Video compression--Standard MPEG (Video coding standard) H.264 (Video coding standard) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-03-02 |
| Abstract | The H.264/MPEG-4 AVC is the new highly efficient video coding standard designed for wide range of applications. The integer transform which is the approximated version of discrete cosine transform (DCT) is used in the H.264/MPEG-4 A VC standard. However, the drawback of DCT based coding is the blocking artifacts and mosquito noises which frequently appear in the low bit rate environment. On the other hand, there are many examples which show that wavelet based compression performs better than DCT based video coding. Therefore, the discrete wavelet transform (DWT) based H.264/MPEG-4 A VC video codec is proposed to compare the coding performance with that of the original integer transform based H.264/MPEG-4 AVC video coding standard. The DWT with different filters in each decomposition level, Zerotree Entropy Coding (ZTE), variable block size for block motion estimation and overlapped block motion compensation (OBMC) are used as the main parts of the proposed DWT based encoder. In addition, the hybrid H.264/ZTE scheme is proposed for further studying the performance when the integer based transform is used for intra frame coding and the discrete wavelet transform is applied for inter frame coding. The performance evaluation is carried through the video sequences that are categorized for the experiment on three main applications, namely Video Streaming, Videoconferencing and Entertainment application. From the simulation, the subjective results of the proposed scheme provide almost the same quality as the results from the integer transform based encoder, although the PSNR values of the proposed scheme are less than that of the integer transform based H.264/MPEG-4 A VC by 0.3-2.4 dB for luminance component. The hybrid H.264/ZTE scheme gives an averaged 0.36 dB improvement of luminance component against the proposed DWT based video codec. However, for chrominance component, the PSNR values of both proposed schemes are comparable to that of the integer transform based H.264/MPEG-4 A VC depending on the video sequences and bit-rate values. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-03-02 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Teerapat Sanguankotchakorn; |
| Examination Committee(s) | Ahmed, Kazi M. ;Erke, Tapio J. ; |
| Scholarship Donor(s) | Royal Thai Government Fellowships; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |