Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent
1996-08-29
1998-01-13
Kuntz, Curtis
Electrical audio signal processing systems and devices
Including frequency control
Automatic tone control
381 98, H03G 500
Patent
active
057087237
ABSTRACT:
A recording and reproducing apparatus for an audio signal including a low pass filter removing high frequency components of a predetermined frequency or more of an audio signal having a wide band, an A/D conversion circuit converting the audio signal from the low pass filter into a digital signal, a memory for storing in order to record a predetermined period of time of the digitized audio signal from the A/D conversion circuit, a D/A conversion circuit converting the audio signal read from the memory into an analog signal, a tone control circuit conducting a frequency correction on the audio signal, and a control circuit controlling the tone control circuit such that, with respect to the audio signal recorded in the memory or the audio signal read from the memory low frequency components of the audio signal to be reproduced are attenuated in correspondence with the high frequency components of the audio signal which have been removed by the low pass filter whereby the audio signal with no conspicuous unnaturalness can be reproduced.
REFERENCES:
patent: 5028883 (1991-07-01), Itoh et al.
patent: 5241696 (1993-08-01), Mori et al.
patent: 5448534 (1995-09-01), Okada
Chang Vivian
Kuntz Curtis
Maioli Jay H.
Sony Corporation
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