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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/65717
標題: | 設計餘式Wyner-Ziv編碼來處理 在解碼器端有旁訊息之源編碼問題 Design of Residual Wyner-Ziv Coding for Source Coding with Side Information at Decoder |
作者: | Yi-Peng Wei 魏逸鵬 |
指導教授: | 蘇炫榮(Hsuan-Jung Su) |
關鍵字: | Wyner-Ziv 編碼,二次高斯,解碼器有旁訊息的源編碼,低密度檢查碼,低密度產生碼,同時為好的源編碼及通道編碼, Wyner-Ziv coding,SCSI,quadratic Gaussian,rate distortion,LDPC,LDGM,simultaneously good for source and channel code, |
出版年 : | 2012 |
學位: | 碩士 |
摘要: | We deal with a source coding problem with the side information only at the decoder (SCSI).We propose and implement a new structure , called residual WZC, for the quadratic-Gaussian SCSI where the side information is arbitrarily distributed. In our two-stage residual WZC, the source is quantized twice and the input of the second stage is the quantization error (residue) of the first stage. The codebook of the first stage quantizer must be simultaneously
good for source and channel coding, since it also acts as a channel code at the decoder. By using the modified reinforced belief-propagation quantization algorithm, the low-density parity check code (LDPC), whose edge degree is optimized for the channel coding, also performs well as a source code. We then implement the residual WZC by a LDPC and a low-density generator matrix code (LDGM). The simulation results show that our practical construction approaches the rate distortion bound with the best performance in the world now. Compared with previous works, our construction can offer more design flexibility in terms of distribution of side information and practical code rate selection. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/65717 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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