In this paper, a decentralized H-infinity-controller design problem for two-channel systems is considered. A parametrization of all decentralized stable factors is proposed. With the parametrization of all decentralized stable factors, the class of decentralized compensators is parametrized. The decentralized H-infinity-controller design procedure is built upon the J-spectral factorization approach to H-infinity-control. A class of decentralized suboptimal controllers satisfying the H-infinity norm bound is parametrized. A design procedure for decentralized suboptimal H-infinity-controllers is suggested.