Pulse or digital communications – Pulse code modulation – Differential
Patent
1997-07-17
2000-05-16
Chin, Stephen
Pulse or digital communications
Pulse code modulation
Differential
341141, H04B 1406
Patent
active
060647000
ABSTRACT:
A switching device for switching between a 1-bit digital signal .SIGMA..DELTA. modulated by a first sampling frequency and a 1-bit digital signal .SIGMA..DELTA. modulated by a second sampling frequency lower than the first sampling frequency. The 1-bit digital signal .SIGMA..DELTA. modulated by the second sampling frequency is transiently converted to the 1-bit digital signal .SIGMA..DELTA. modulated by the first sampling frequency. The converted 1-bit digital signal or the 1-bit digital signal .SIGMA..DELTA. modulated by the first sampling frequency is switched by cross-fading processing for realizing switching with suppressed noise generation at the time of switching.
REFERENCES:
patent: 5225787 (1993-07-01), Therssen
patent: 5497152 (1996-03-01), Wilson et al.
patent: 5712838 (1998-01-01), Inazawa et al.
patent: 5793316 (1998-08-01), Noguchi et al.
patent: 5916301 (1999-06-01), Rothacher
Ichimura Gen
Noguchi Masayoshi
Chin Stephen
Maioli Jay H.
Rupert Paul N
Sony Corporation
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