H - Electricity – 03 – M
Patent
H - Electricity
03
M
352/19, 354/67
H03M 7/14 (2006.01) G11B 20/14 (2006.01) H04L 25/49 (2006.01) H04N 5/926 (2006.01)
Patent
CA 1192309
ABSTRACT OF THE DISCLOSURE A system of encoding an original binary digital video signal comprised of a plurality of first 8-bit words having an absolute value and a digital sum variation, to produce an encoded binary digital video signal, converts each first 8-bit word into a second 8-bit word also having an absolute value and a digital sum variation such that, with respect to predetermined groups of correlative first 8-bit words, that is, first 8-bit words having absolute values which are close to each other, second 8-bit words corresponding to the first 8-bit words in each respective group have the same digital sum variation; and then inverts every alternate m second 8-bit words, where m = 1, 2, 3..., to form the encoded binary digital video signal with substantially reduced DC content while maintaining the same recording bit rate.
412772
Gowling Lafleur Henderson Llp
Sony Corporation
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