  This paper deals with the chaotic oscillator synchronization. A new approach
to the synchronization of chaotic oscillators has been proposed. This approach
is based on the analysis of different time scales in the time series generated
by the coupled chaotic oscillators. It has been shown that complete
synchronization, phase synchronization, lag synchronization and generalized
synchronization are the particular cases of the synchronized behavior called as
"time-scale synchronization". The quantitative measure of chaotic oscillator
synchronous behavior has been proposed. This approach has been applied for the
coupled R\"ossler systems and two coupled Chua's circuits.
