[Mp4-tech] Decreasing the data content in the base layer

[Anand PG]

Hi
    I am using the JSVM codec v 6.8.2 for my research and I have a
base layer(BL) and a single enhancement layer(EL) in my setup. The
enhancement layer is a FGS layer. I am trying to increase the content
of the DCT co-efficients in the FGS EL layer and if possible, put all
the DCT coefficents in the EL alone. I know for a fact that I can
achieve this by increasing the Quantization Parameter of the BL. But,
even if I increase the QP to the maximum possible allowed by the
codec, which is 51, the PSNR values I get if I decode just the BL
alone is around 24 dB which is still very good quality. I would like
to have it around 5 dB or less. Can anybody suggest an alternative
solution and also tell me whether I am wrong in my notion about
increasing the QP to decrease the DCT co-efficents in the base layer?
Thanks
Anand