Regarding MDCT

 Hi all,

 I would like to ask you regarding MDCT specially ,as we know MDCT is 

 DCT (type-4) with 50% overlap on consective block applied in MPEG-4 AAC 
 
 low delay.I could not get proper understanding how it works internally.

 Example: 

 MDCT =[  DCT(type-4)* TDAC * Window ]
	 Cosider for example we have MDCT of 2n inputs and n outputs and this n 
 
 output is equal to DCT (type-4) inputs..
	 I would like to know how this is mapped as inputs to DCT(type-4) and how 
 
 TDAC is avoided..

 I have gone through the web site as mentioned above 
 
 http://en.wikipedia.org/wiki/Modified_discrete_cosine_transform.

 I would like to have better and clear explanation then this.Please 

 give some web sites or book names which will be available with this topic.

 Thank you,

 Deep