Apparatus and method for digital combination of delta modulated data,申请号US19800114138-传众专利搜索

Apparatus and method for digital combination of delta modulated data

申请公布号：US4313033(A)

申请号：US19800114138

申请日期：1980.01.21

申请公布日期：1982.01.26

申请人：

HUGHES AIRCRAFT COMPANY

发明人：WALKER, DONALD F.;PHELPS, ROBERT G.

分类号：H04M3/56;(IPC1-7):H03K13/22;H04J3/04;H04Q11/04

主分类号：H04M3/56

摘要：Apparatus and method for processing sound as delta modulated digital data bits. A speaker console communicates with a listener console through a central switching unit. Tri-state generators within the central switching unit convert bipolar data modulated speaker data to tri-state logic which is then multiplexed onto a bus. The bus is sampled by a plurality of listener modules of a majority detector unit according to desired speaker combinations and a majority output is thereby determined for each time slot. A data generator modifies a bipolar delta modulated idle waveform according to the state of the idle waveform and the historical output of a listener module, incrementing and decrementing a carry register and a borrow register in the data generator to reflect storage, insertion or cancelling of majority "ones" or "zeros". The combining logic of the data generator enables the central switching unit to produce a combined output having the initial speaker data bit rate.