Method and apparatus for decoding and recording composite digita

Details Method and apparatus for decoding and recording composite digita Method and apparatus for decoding and recording composite digita

1983-09-30

1984-08-07

Psitos, Aristotelis M.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 13, 358 15, H04N 9191, H04N 936

Patent

active

044646852

ABSTRACT:
A decoder-recoder arrangement for decoding a composite digital television signal for recording on a digital video recorder and for subsequently recoding the reproduced signal, the arrangement comprising a decoder including filters for separating two chrominance components from the composite digital television signal, demodulators for demodulating the chrominance components, sample rate reducers for reducing the sample rates of the demodulated chrominance components, interpolators for interpolating samples into the sample-reduced demodulated chrominance components to restore the sample rate to the original value, modulators for remodulating the interpolated chrominance components, an adder for adding together the modulated interpolated chrominance components, and a subtractor for subtracting the output of the adder from the input composite digital television signal; and a recoder including interpolators for interpolating samples into said sample-reduced demodulated chrominance components to restore the sample rate to the orignal sample value, modulators for modulating the interpolated chromiance components obtained from the interpolators, an adder for adding together the outputs of the modulators, and a further adder for adding the output of the adder to the output of the subtractor of the decoder to derive the original composite digital television signal.

REFERENCES:
patent: 3764739 (1973-10-01), Faroustja
patent: 3889288 (1975-06-01), Rennick
patent: 4051516 (1977-09-01), Weston
patent: 4051517 (1977-09-01), Hjortzberg
patent: 4212028 (1980-07-01), Drewery
patent: 4268861 (1981-05-01), Schreiber et al.
"Electronic Field Stove Standards Convertor" Davies et al., Proc. IEEE, vol. 118, No. 3/4, Mar./Apr. 1971, pp. 460-467.
"Television Standards Converter Using Digital Techniques" The Radio & Electronic Engr., vol. 43, No. 3, Mar. 1973, pp. 230-232.
"Low Bit Rate System for Digital Coding of the Television Picture" Rainger et al., Journal of the SMPTE, vol. 88, Aug. 79, pp. 550-554.

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