Television signal arrangement where selected signals are encoded

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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Details

358133, 358174, 358136, H04N 712, H04N 700

Patent

active

050400622

ABSTRACT:
A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal and encoding the remaining signals. In the encoding, a portion of the signals to be transmitted is created in the form of an analog signal or a concatenated plurality of pulse amplitude coded samples (A-signal), and another portion of the signals to be transmitted is created in digital form (D-signal). The D-signal is consigned to a specified portion of the transmitted signal, leaving the remainder of the transmission capacity for the A-signal. When the normally created digital signals do not fully occupy the digital portion, enhanced operation results when selected ones of the analog signals or samples are excised from the A-signal, encoded digitally, and added to the D-signal. The excising of those signals leaves room in A-signal portion to include additional analog signals. This leads to an overall better image reproduction at the receiver. In addition, the samples that are excised are selected from among be the ones whose delection from the A-signal benefits the system most.

REFERENCES:
patent: 4551754 (1985-11-01), Meise et al.
patent: 4748496 (1988-05-01), Drury et al.

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