Patent ID: 6122010
Filing Date: 2000-09-19
Classification: H04L,H04N

Abstract:
A data transmission system for transmitting data via a television signal, the system comprising:transmitting means adapted for transmitting the television signal, comprising:(a) encoding means adapted for receiving raw data and generating digital encoded data indicative of the raw data, wherein said encoding means includes:means for establishing at least N+1 output levels, each transition in said output level representing an encoded input value indicative of raw data; andmeans for receiving a plurality of input values to be encoded, wherein said input values may be one of N different values, andmeans for transitioning from one of said at least N+1 output levels to another of said at least N+1 output levels for each successively received input value, wherein each and every successive output level is different, regardless of the successively received input value, said transitioning output levels forming the digital encoded data; and(b) first conversion means adapted for converting the digital encoded data to analog encoded data, said analog encoded data forming a portion of the television signal; andreceiving means adapted for receiving the television signal, comprising:(a) second conversion means adapted for converting the analog encoded data to digital encoded data, and(b) decoding means adapted for converting the digital encoded data to raw data.