  We propose a protocol for conditional suppression of losses in direct quantum
state transmission over a lossy quantum channel. The method works by
noiselessly attenuating the input state prior to transmission through a lossy
channel followed by noiseless amplification of the output state. The procedure
does not add any noise hence it keeps quantum coherence. We experimentally
demonstrate it in the subspace spanned by vacuum and single-photon states, and
consider its general applicability.
