H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/34
H04N 7/00 (2006.01) H04N 7/015 (2006.01)
Patent
CA 2000292
HIGH DEFINITION B-MAC TELEVISION SIGNAL TRANSMISSION SYSTEM ABSTRACT OF THE DISCLOSURE A method for encoding a high definition television signal consistent with the B-MAC composite signal format comprises the steps of orthogonally sampling the high definition signal, diagonally filtering diagonal resolution information, decimating alternate samples of alternate lines and folding in high frequency horizontal resolution information by means of a skew-symmetric low-pass filter. Encoding apparatus involves the application of separable horizontal and vertical digital filters for the diagonal filter, the vertical filter being less complex than the horizontal filter. Furthermore, only a line store is required at either an encoder or decoder location. At a receiver location, a field store and proprietary line doubling techniques may be provided and applied for obtaining vertical resolution improvement.
Scientific-Atlanta Inc.
Sim & Mcburney
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