Patent ID: 6388717
Filing Date: 2002-05-14
Classification: H04L,H04N

Abstract:
A digital television transmitting system having a recovery circuit for recovering non-return to zero (NRZ) data pulses and transport clock pulses from a biphase-mark serial data pulse stream wherein said NRZ data pulses and said transport clock pulses were previously combined into said biphase-mark serial data pulse stream and wherein said recovered NRZ data pulses and said recovered transport clock pulses are to be applied to modulation and amplifying means for broadcasting by an antenna, said recovery circuit comprising:first means for receiving said biphase-mark serial pulse stream and providing therefrom a train of first clock pulses wherein the rising edge of each said biphase-mark pulse corresponds with a rising edge of one of said first clock pulses; second means for receiving said biphase-mark serial data pulses and said first clock pulses for providing therefrom a train of de-serialized data pulses each having a rising edge corresponding with a rising edge of one of said first clock pulses; and, third means for receiving said de-serialized data pulses and said first clock pulses for converting said de-serialized data pulses into recovered NRZ data pulses.