摘要
介绍了MPEG-4无损音频压缩标准,并提出了2个改进措施。一是在原有预测器的基础上增加一种新的预测方案以供选择;二是在熵编码中精确搜索最优参数,并引入分组打包机制以更有效地利用编码比特。在运算复杂度增加不多的情况下,压缩效率有明显提高。
In this paper,a framework of MPEG-4 lossless audio encoder is introduced. Two improvements are proposed for enhancing the compression performance while low complexity is remained. One is a new efficient predictor,and the other is fine searching for the optimal parameter and grouping data in entropy encoding.
出处
《电声技术》
2005年第10期54-56,共3页
Audio Engineering
关键词
无损音频压缩
预测
熵编码
打包
lossless audio compression
prediction
entropy encoding
packing
