[XviD-devel] VHQ

[Christoph Lampert]

On Wed, 12 Feb 2003, Radek Czyz wrote:

> Heya everybody,
> 
> I have good news - I fixed all known VHQ bugs and I'm preparing to
> commit the code. Anyone would like to comment? What I mean is if
> someone would like to stop me for whatever reason, please do it now.

Nice indeed... even if I couldn't check anything else, yet, I got 
for foreman QCIF at different quality levels, fixed quant 6:

without _BITS options 

Avg: enctime(ms) =  20.91, fps =  47.82, length(bytes) = 1430  <- FP
Avg: enctime(ms) =  18.26, fps =  54.76, length(bytes) = 1461     FP+ext
Avg: enctime(ms) =  26.41, fps =  37.87, length(bytes) = 1046  <- HP
Avg: enctime(ms) =  27.45, fps =  36.43, length(bytes) = 1030     HP+ext
Avg: enctime(ms) =  31.62, fps =  31.63, length(bytes) = 1018  <- HP+4MV
Avg: enctime(ms) =  43.47, fps =  23.00, length(bytes) = 1004     HP+4+ext
Avg: enctime(ms) =  74.31, fps =  13.46, length(bytes) =  814  <- QP+4+ext



with many _BITS options

Avg: enctime(ms) =  34.05, fps =  29.37, length(bytes) = 1425   -5   -0.3%
Avg: enctime(ms) =  28.84, fps =  34.68, length(bytes) = 1455   -6   -0.3%   
Avg: enctime(ms) =  78.26, fps =  12.78, length(bytes) = 1017  -29   -2.6%
Avg: enctime(ms) =  81.15, fps =  12.32, length(bytes) =  963  -65   -6.5%
Avg: enctime(ms) = 115.36, fps =   8.67, length(bytes) =  947  -71   -6.9%
Avg: enctime(ms) = 126.70, fps =   7.89, length(bytes) =  930  -74   -7.3% 
Avg: enctime(ms) = 222.01, fps =   4.50, length(bytes) =  763  -51   -6.2%


Of course this is only 1 clip, I didn't check PSNR and speed dropped
severely, etc, but it's quite a good start! 

gruel