标签:and res 通过 lock var nbsp mds more proc
Enhanced channel coupling是一种spatial coding 技术,在传统的channel coupling的基础上添加了phase compensation, de-correlation mechanism, variable time constants, and
more compact amplitude representation.这些技术可以减少encoder coupling带来的artifacts.
Enhance channel coupling可以在更低的频率进行coulping而不会明显增加coupling artifacts.在更低的频率进行coupling可以增加coder efficiency.
1.Encoder Enhanced Coupling Process
Encoder enhanced coupling process的block diagram如下:
Enhanced coupling以512 sample为一个block, 50%的overlap,计算MDCT 和MDST来进行angle adjustment.
MDCT作为real-number part, MDST作为imaginary-number part,组合成complex-valued pair。通过使用omplex-valued pair使得在downmix前的phase rotations更加精确。
EAC3 enhanced channel coupling
标签:and res 通过 lock var nbsp mds more proc
原文地址:https://www.cnblogs.com/fellow1988/p/9017277.html