US 4,225,963 AGranted

Arrangement for processing a delta modulation signal, in particular for decoding these signals

AssigneeTelecommunications Radioelectriques et Telephoniques T.R.T.

InventorGilbert M. M. Ferrieu

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Abstract

A device for processing a signal coded by means of delta modulation with a sampling rate F, comprises an analyzer for the delta modulation signal for successively forming data each of which characterizes the number of binary elements of two successive trains formed by different binary elements, each train comprising a binary element or a series of identical binary elements, a store in which said data are entered, and, finally, means for forming from the data entered into the store a sequence of binary elements composed of .lambda. times the two above-mentioned trains with a frequency of the binary elements equal to 2.lambda.F, .lambda. being an integer exceeding one. The device supplies a digital signal, which, after decoding, constitutes an excellent approximation of the analog signal which had been coded.

Claims6

Dependent claims

A processing device for decoding a digital signal formed from binary elements which occur at the frequency F and are produced by coding an analog signal by means of delta modulation, said device comprising:

a device means for analysing digital signal for successively forming data each representing the number of binary elements of two consecutive trains of different binary elements each of which comprises a binary element or a series of several identical binary elements,
a store in which said data are successively entered,
means for forming, on the basis of said data read from the store, a sequence of binary elements, said formed sequence having .lambda. times the two previously recited consecutive trains of binary elements, said formed sequence having a binary element frequency equal to 2.lambda.F, wherein .lambda. is an integer exceeding 1, the end of each formed sequence controlling the erasure of the data in the store used to form said sequence, and the reading of the following data.

Dependencies are inferred from the claim text.