Digital circuit for the introduction and later removal of dither from an analog signal
Abstract
An electronics circuit is presented for accurately digitizing an analog audio or like data signal into a digital equivalent signal by introducing dither into the analog signal and then subsequently removing the dither from the digitized signal prior to its conversion to an analog signal which is a substantial replica of the incoming analog audio or like data signal. The electronics circuit of the present invention is characterized by a first pseudo-random number generator which generates digital random noise signals or dither for addition to the digital equivalent signal and a second pseudo-random number generator which generates subtractive digital random noise signals for the subsequent removal of dither from the digital equivalent signal prior its conversion to the analog replica signal.
- Publication:
-
Patent Department of the Navy
- Pub Date:
- May 1994
- Bibcode:
- 1994navy.reptQV...B
- Keywords:
-
- Analog To Digital Converters;
- Digital Electronics;
- Dithers;
- Logic Circuits;
- Pulse Code Modulation;
- Signal Processing;
- Analog Data;
- Audio Data;
- Patents;
- Random Noise;
- Random Numbers;
- Replicas;
- Electronics and Electrical Engineering