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This paper describes the proposed improvements to the ATSC DTV standard. The proposed system provides a mechanism for embedding a new robust bit-stream in the standard bit-stream in a backward compatible manner. The robust stream has a higher threshold of visibility (TOV) compared to the standard stream and can be transmitted either in the pseudo 2-VSB mode or in the enhanced-coded 8-VSB (E-VSB) mode. A prototype transceiver system, based on the proposed system, has been developed and was tested in the lab and in the field. The results of these tests will be briefly reviewed in this paper.
Date of Publication: Nov. 2003