一种新的MPEG音频解码方案及算法优化  

A Novel MPEG Audio Decoder Design and Improved Algorithm

作　　者：张瑾[1] 郑伟[1] 张丁[1] 王匡[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《中国有线电视》2005年第14期1397-1400,共4页China Digital Cable TV

摘　　要：设计了一种新的MPEG音频解码框架。输入音频数据不需经过串行化,通过桶型移位器组织数据读取,提高了解码效率。解码器针对硬件处理特性设计了专用比特流输入单元和解组处理单元。对运算瓶颈子带滤波器设计了优化算法,使运算量降低为标准算法的1/4左右,存储空间降低为原来的1/2。该方案可用于DVB和DAB信源解码芯片中。This paper presents a novel architecture of MPEG audio decoder, the input audio stream will not be serialized before decoding. Barrel shift register is used to fetch data from input buffer, which improves the efficiency of decoding process substantially. Dedicated hardware is designed to deal with input and degroup. In this scheme, the computation amount of bottleneck module can be reduced to one-fourths of the original one, and the memory storage requires half of the standard synthesis filter bank. This decoder can be used in DVB and DAB source decoding and etc.

关 键 词：MPEG-2 音频解码 DVB DAB 高清电视 

分 类 号：TN912.3[电子电信—通信与信息系统]