计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2015年
8期
226-230,244
,共6页
语音增强%维纳滤波%离散余弦变换%自适应处理
語音增彊%維納濾波%離散餘絃變換%自適應處理
어음증강%유납려파%리산여현변환%자괄응처리
speech enhancement%Wiener filtering%discrete cosine transform%adaptive processing
针对非平稳噪声和强背景噪声下声音信号难以提取的实际问题，提出了一种DCT域的维纳滤波方法。列出了DCT域清浊音分割步骤，给出了DCT域频谱信噪比迭代更新机制与具体实施方案，设计了DCT域的二维维纳滤波。实验仿真表明，该算法能有效地去噪滤波，改善可懂度，且在不同的噪声环境和信噪比条件下具有鲁棒性。该算法计算代价小，简单易实现。
針對非平穩譟聲和彊揹景譟聲下聲音信號難以提取的實際問題，提齣瞭一種DCT域的維納濾波方法。列齣瞭DCT域清濁音分割步驟，給齣瞭DCT域頻譜信譟比迭代更新機製與具體實施方案，設計瞭DCT域的二維維納濾波。實驗倣真錶明，該算法能有效地去譟濾波，改善可懂度，且在不同的譟聲環境和信譟比條件下具有魯棒性。該算法計算代價小，簡單易實現。
침대비평은조성화강배경조성하성음신호난이제취적실제문제，제출료일충DCT역적유납려파방법。렬출료DCT역청탁음분할보취，급출료DCT역빈보신조비질대경신궤제여구체실시방안，설계료DCT역적이유유납려파。실험방진표명，해산법능유효지거조려파，개선가동도，차재불동적조성배경화신조비조건하구유로봉성。해산법계산대개소，간단역실현。
Acoustic signal is difficult to be extracted under noise with strong background non-stationary noise, a Wiener filtering method is proposed at DCT domain. The paper details segmentation steps between the voiceless and voiced, to give the SNR iterative update method and the concrete implementation plan on DCT domain spectrum, to design the two-dimension Wiener filtering on DCT domain. Experimental simulation shows that the algorithm can effectively denoise and filter, improve the intelligibility, and is robust in different noise environment and SNR conditions. The algorithm com-putational cost is small, easy to realize.
