<s>
In	O
data	B-General_Concept
compression	I-General_Concept
,	O
twin	B-General_Concept
vector	I-General_Concept
quantization	I-General_Concept
is	O
related	O
to	O
vector	B-Algorithm
quantization	I-Algorithm
,	O
but	O
the	O
speed	O
of	O
the	O
quantization	O
is	O
doubled	O
by	O
the	O
secondary	O
vector	O
analyzer	O
.	O
</s>
