[Sample of control files for DRC]

- drc#_enc.ctl : control file for encoder
- drc#_enc.cfg : config files for encoder
		  2 flags (as below) are inserted just before intra_dc_vlc_thr.
                  1. Reduced Resolution VOP enable: 0-disabled, 1-enabled
                  2. Reduced Resolution VOP switching mode: 0-no switching, 1-VM switching, negative value-fixed interval switching
		  (These flags exist only when Version Identifier is Version2. 
		   Value of the 2nd flag has no influence when the 1st flag set to zero.)

    #=1: control & config files for VM switching mode
    #-2: control & config files for fixed interval switching mode


[Reduced Resolution VOP switching mode parameters]

(1). VM switching
	If Reduced Resolution VOP switching mode is set to 1, the resolution decision of each encoding vop is done by the algorithm described in the MPEG-4 Verification Model.  This mode is implemented in combination with the VM5+-Q2-Macroblock based rate control.

(2). fixed interval switching	
	If Reduced Resolution VOP switching mode is set to negative value(i.e. -n), The switching between normal resolution and reduced resolution occurs in every fixed encoded vop interval(i.e. in every nth encoded vop).  This switching mode is implemented for the use of bitstream exchange and debugging with no rate control.  Two examples are shown below(N:normal resolution vop, R:reduced resolution vop).

Example 1. Reduced Resolution VOP switching mode=-1
        t ---------------->
          NRNRNRNRNRNR....	

Example 2. Reduced Resolution VOP switching mode=-4
        t ---------------->
          NNNNRRRRNNNN....	

--
Eishi Morimatsu
Fujitsu Laboratories Ltd.
(06-SEP-1999)






