Density function centric signal processing

A system comprising one or more computers and one or more storage devices on which are stored instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising:

• extracting a first density function of a noise signal;
• extracting a first attribute of the first density function;
• producing a first unidirectional density function signal level as a function of the first attribute;
• storing the first unidirectional density function signal level in response to a predetermined condition as a density function stored signal level;
• extracting a second density function of the noise signal after the first unidirectional density function signal level is stored, wherein the second density function is different from the first density function;
• extracting a second attribute of the second density function, wherein the second attribute is different from the first attribute;
• producing a second unidirectional density function signal level as a function of the second attribute, wherein the second unidirectional density function signal level is different from the first unidirectional density function signal level;
• determining whether the second unidirectional density function signal level satisfies a functional relationship with the first unidirectional density function signal level by comparing the second unidirectional density function signal level to the first unidirectional density function signal level;
• and
• generating a control signal in response to determining that the second unidirectional density function signal level satisfies the functional relationship with the first unidirectional density function signal level.

One or more non-transitory computer storage media encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:

• extracting a first density function of a noise signal;
• extracting a first attribute of the first density function;
• producing a first unidirectional density function signal level as a function of the first attribute;
• storing the first unidirectional density function signal level in response to a predetermined condition as a density function stored signal level;
• extracting a second density function of the noise signal after the first unidirectional density function signal level is stored, wherein the second density function is different from the first density function;
• extracting a second attribute of the second density function, wherein the second attribute is different from the first attribute;
• producing a second unidirectional density function signal level as a function of the second attribute, wherein the second unidirectional density function signal level is different from the first unidirectional density function signal level;
• determining whether the second unidirectional density function signal level satisfies a functional relationship with the first unidirectional density function signal level by comparing the second unidirectional density function signal level to the first unidirectional density function signal level;
• and
• generating a control signal in response to determining that the second unidirectional density function signal level satisfies the functional relationship with the first unidirectional density function signal level.