H - Electricity – 03 – M
Patent
H - Electricity
03
M
350/33, 354/68
H03M 3/04 (2006.01) G06T 9/00 (2006.01) H03M 7/36 (2006.01) H04N 3/00 (2006.01) H04N 7/12 (2006.01) H04N 7/34 (2006.01) H04N 11/02 (2006.01)
Patent
CA 1216948
21 ABSTRACT: Differential pulse code modulation transmission system comprising a transmitter and a receiver. In the transmitter there is subtracted from an informational signal x(n) to be transmitted a prediction signal y(n) for the purpose of generating a difference signal e(n), which is quantized and converted into a quantized difference signal in a quantizing arrangement 6. This difference signal is applied to a prediction circuit 7 for generating the pre- diction signal. It is also transmitted to the associated receiver. In that receiver a similar prediction signal is generated by means of a similar prediction circuit, which prediction signal is now added to the received quantised difference signal. In order to limit the influence of transmission errors in this transmission system, without an excessive increases in equipment, the quantised differ- ence signal is applied in the transmitter and in the receiver to a cascade arrangement of a non-linear network 16 and an auxiliary prediction circuit 17, which produces an auxiliary prediction signal. Before the quantised differ- ence signal is applied to the prediction circuit the auxiliary prediction signal is first added thereto.
438541
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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