噪声特点分析在老电影声音数字修复中的应用

Application of Noise Characteristics Analysis in Digital Soundtrack Restoration for Old Films

基于当前国内老电影声音修复的现状——声音数字修复中使用的去噪、编辑等工具需要人工干预的成分较多,导致声音修复效率无法有效提升.本文在数十部老电影声音数字修复的实践经验基础上,分别挑选20世纪50,60,70,80年代的多部老电影,从中截取数十段噪声样本,对其进行分类梳理和噪声声学特点分析,并对每段噪声给出当前常用去噪办法的说明.本文的研究内容为未来电影声音修复的算法研发及相关研究提供了一份真实可靠、具有借鉴价值的数据支持.

Due to the frequent manual interventions on noise eliminating and editing in soundtrack restoration for domestic old films,its efficiency remains unsatisfactory for decades.Therefore,this paper selects a number of Chinese old films from the 50 s,60s,70 s,and 80 sof the 20 th Century respectively,out of which tens of sample pieces of noise were clipped.Researches on the noise classification and acoustic characteristic analysis based on these noise samples,along with a specification of the current professional approaches to their removal are reported.This paper provides a reliable and valuable reference dataset to further researches and development on algorithmic soundtrack restoration for the Chinese old films.