System and method for digital signal processing

• US 10,313,791 B2
• Filed: 02/27/2018
• Issued: 06/04/2019
• Est. Priority Date: 10/22/2013
• Status: Active Grant

• Current Assignee: Bongiovi Acoustics LLC
• Original Assignee: Bongiovi Acoustics LLC
• Inventors: Bongiovi, Anthony, Fuller, Philip, Zelniker, Glenn
• Primary Examiner(s): Sniezek, Andrew L
• Application Number:
  US15/906,614
• Publication Number:
  US 20180255396A1
• Time in Patent Office: 462 Days
• CPC Class Codes: G06F 16/60 of audio data
• CPC Class Codes: G06F 3/165 Management of the audio stream, e.g. setting of volume, audio stream path
• CPC Class Codes: G10L 21/034 Automatic adjustment
• CPC Class Codes: H03G 3/002 Control of digital or coded signals H03G3/3089 take precedence
• CPC Class Codes: H03G 3/005 Control by a pilot signal H03G3/001 takes precedence
• CPC Class Codes: H03G 5/025 Equalizers; Volume or gain control in limited frequency bands
• CPC Class Codes: H03G 5/165 Equalizers; Volume or gain control in limited frequency bands
• CPC Class Codes: H03G 7/002 in untuned or low-frequency amplifiers, e.g. audio amplifiers H03G7/007, H03G7/001, H03G7/008, H03G7/02, H03G7/06 take precedence
• CPC Class Codes: H03G 7/007 of digital or coded signals
• CPC Class Codes: H03G 9/005 of digital or coded signals
• CPC Class Codes: H03G 9/025 frequency-dependent volume compression or expansion, e.g. multiple-band systems H03G9/10, H03G9/18 take precedence
• CPC Class Codes: H03G 9/14 for gain control and tone control
• CPC Class Codes: H04R 3/04 for correcting frequency response
• CPC Class Codes: H04S 7/307 Frequency adjustment, e.g. tone control H04S7/301 takes precedence

Abstract

A system and method for digital processing including a gain element to process an input audio signal, a high pass filter to then filter the signal and create a high pass signal, a first filter module to filter the high pass signal and create a first filtered signal and a splitter to split the high pass signal into two high pass signals. The first filter module filters one high pass signals before a first compressor modulates the signal or a high pass signal to create a modulated signal. A second filter module filters the modulated signal to create a second filtered signal that is processed by a first processing module including a band splitter that splits the signal into low and high band signals that are then modulated by compressors. A second processing module processes the modulated low and high band signals to create an output signal.

Claims

1. A system for digital signal processing of an input audio signal comprising:

a high pass filter configured to filter an audio signal to create a high pass signal,

a first filter module configured to filter the high pass signal to create a first filtered signal,

a first compressor configured to modulate the first filtered signal to create a modulated signal,

a second filter module configured to filter the modulated signal to create a second filtered signal,

a first processing module configured to process the second filtered signal to create a processed signal,

a band splitter configured to split the processed signal into at least a first low band signal and a second high band signal,

at least a first modulator structured to modulate said first band signal and a second modulator structured to modulate said second band signal to create a first and a second modulated band signal, and

a second processing module configured to process at least said first and said second modulated band signals to create an output signal.

2. A system as recited in claim 1 wherein the first filter module comprises:

a first low shelf filter configured to filter the high pass signal to create a first low shelf signal,

a first high shelf filter configured to filter the first low shelf signal to create the first filtered signal.

3. A system as recited in claim 1 wherein said second filter module comprises:

a second low shelf filter configured to filter the modulated signal to create a second low shelf signal, and

a second high shelf filter configured to filter second low shelf signal to create the second filtered signal.

4. A system as recited in claim 1 wherein said first filter module comprises a low shelf filter and said second filter module comprises a high shelf filter.

5. A system as recited in claim 1 further comprising a first gain element configured to adjust a gain of the input audio signal prior to said high pass filter.

6. A system as recited in claim 1 wherein said first processing module comprises a gain element configured to adjust the gain of the second filtered signal to create a gain signal;

and a peak/dip module configured to process the gain signal to create the processed signal.

7. A system as recited in claim 1 wherein said second processing module comprises:

a summing module configured to combine at least the first and second modulated band signals to create a combined signal, and a gain element configured to adjust the gain of the combined signal to create the output signal.

8. A system as recited in claim 1 wherein said band splitter splits the processed signal into at least a low band signal and a high band signal, and said first modulator comprises a band compressor.

9. A system as recited in claim 8 wherein said first modulator comprises a low band modulator and said second modulator comprises a high band modulator.