H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/12 (2006.01) H03M 13/25 (2006.01) H03M 13/35 (2006.01) H03M 13/39 (2006.01) H04L 27/18 (2006.01)
Patent
CA 2058775
An analogue signal source (10) is coupled to an analysis means (12) to provide a plurality of parameters on a bus (14). The analysis means also provides a reset signal on a separate line (23) and both the bus (14) and the line (23) are fed to a tree coder (22). The reset signal is applied to the tree coder (22) before each parameter is applied on the bus (14) so that the coder commences from a known position in a coding tree for each parameter. The coded signals are supplied on a bus (24) to a modulator (28) having an output which is coupled to a transmitter (30). A system for recreating analogue signals coded in this way is also described which estimates partial values of parameters using the probability that each of the possible encoded sequences resulted in the signal from which the analogue signals are to be recreated. The recreating system may also use the probability of occurrence of each of the possible encoded sequences during the tree coding. This latter probability may be derived from the probability density function of the parameters. The tree coder may optionally be arranged to provide trellis coding, for example, for 8- PSK or 16QAM modulation.
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
N.v. Philips Gloeilampenfabrieken
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