Method for digital transmission of hierarchical HDTV, EDTV and S

Details Method for digital transmission of hierarchical HDTV, EDTV and S Method for digital transmission of hierarchical HDTV, EDTV and S

1993-11-29

1995-11-14

Groody, James J.

Television

Bandwidth reduction system

Data rate reduction

348388, 348408, 348432, 348399, 348426, 371 31, H04N 1106, H04N 1104

Patent

active

054671329

ABSTRACT:
For digital transmission of hierarchical HDTV, EDTV and SDTV television signals, on the transmission side after an analog/digital conversion of video and audio input signals and a subsequent removal of redundancy in a source coder, the signal bits are protected in a UEP coder in accordance with their significance. Thereafter, the hierarchically built up television signals (HDTV, EDTV and SDTV) are subjected to a multilevel coding and, combined to form symbols, to a multiresolution modulation and an OFD multiplexing and transmitted after digital/analog conversion. On the receiving side the transmitted signals, after analog/digital reconversion and inverse OED multiplexing (OFDM), are demodulated in a multiresolution demodulator and then decoded in a multistage decoder. Thereupon the data are processed by digital/analog conversion to HDTV, EDTV and SDTV signals in a UEP decoder specific to the respective receiver and a following source decoder.

REFERENCES:
patent: 5105442 (1992-04-01), Wei
patent: 5134464 (1992-07-01), Basile et al.
patent: 5243428 (1993-09-01), Challapali et al.
patent: 5289501 (1994-02-01), Seshadri et al.
Fernseh und Kino--Technik, "Digital Television Transmission-System Concepts and Chances of Introduction." vol. 46, 1992. pp. 559-561, 566-568, 570.

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