Horology: time measuring systems or devices – Cases – Adaptable
Patent
1993-05-25
1994-02-08
Kostak, Victor R.
Horology: time measuring systems or devices
Cases
Adaptable
348384, 348469, H09N 712, H09N 704, H09N 700
Patent
active
052852768
ABSTRACT:
A frame of compressed video data is formatted for transmission into a plurality of data segments, a first group of which are encoded in the form of a plurality of four-level symbols and a second group of which are encoded in the form of a plurality of two-level symbols for providing improved noise performance. The partition between the first and second groups of data segments may be established on a fixed basis, a variable basis dependent upon the effective level of compression, or a combination of both. Preferably, the levels are selected such that the average levels of the transmitted M and N-level symbols are substantially equal to a non-zero value to assist lock-up of the receiver PLL and reduce transmission power.
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Kostak Victor R.
Metjahic Safet
Zenith Electronics Corp.
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