HDTV transmission system design in an SDG-based STM network

The authors propose an HDTV (high-definition television) transmission system design for an SDH (synchronous digital hierarchy)-based STM network. The proposed HDTV coding algorithms are based on subband coding; one uses subband DCT (discrete cosine transform) for HDTV distribution services, while the other uses subband DPCM (differential pulse code modulation) for HDTV contribution services. The network architecture is discussed in regard to providing broadband communication services such as HDTV transmission service upon the introduction of B-ISDN (broadband integrated services digital network) in the early 1990s. The authors also propose a method to compensate for degradation in video transmission systems, i.e., burst errors in STM networks and consecutive cell loss in ATM (asynchronous transfer mode) networks, using random error correcting codes and an interleave structure. An HDTV transmission experimental system using an SDH-based STM network is described