Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1997-04-23
1999-08-24
Young, Brian
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
H03M 166
Patent
active
059429984
ABSTRACT:
Clocks of various types of input digital audio signals having different sampling frequencies, for example 48.1 KHz, 44.1 KHz and 32 KHz, are extracted by a PLL circuit. The input digital audio signals are converted into signals of a predetermined sampling frequency, for example 41.1 KHz, on average based on the extracted clocks by a frequency converter circuit, and then converted into signals of a uniform output rate by an FIFO circuit. The signals of a uniform output rate from the FIFO circuit are converted into analog outputs by a D/A converter. In this structure, when reproducing the input digital audio signals as monitor sounds while recording the input digital audio signals, it is possible to achieve an improvement of the monitor sounds.
REFERENCES:
patent: 4734797 (1988-03-01), Takahashi et al.
patent: 5387910 (1995-02-01), Medan et al.
patent: 5506932 (1996-04-01), Holmes et al.
patent: 5748126 (1998-05-01), Ma et al.
Sharp Kabushiki Kaisha
Young Brian
LandOfFree
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