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US 9,002,031 B2Granted
Method, system and apparatus for improving the sonic quality of an audio signal
OwnerMichael Yeeinventor
Life of this patent
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Abstract
A device, system and method of playing back a digital audio stream wherein large amounts of pre-emphasis of the high frequencies is applied before the digital to analog conversion and before an interpolation or digital filter, followed by de-emphasis in the analog domain in order to yield better audio fidelity.
Claims27
A method of improving sonic quality of an audio signal comprising:
- a. receiving the audio signal;
- b. performing a high frequency emphasis on the audio signal producing an emphasized audio signal;
- c. interpolating the emphasized audio signal by digitally upsampling the emphasized audio signal;
- d. converting the emphasized audio signal to analog producing an emphasized analog audio signal;
- and
- e. performing a high frequency de-emphasis on the emphasized analog audio signal in the analog domain producing an output audio signal, wherein the de-emphasis is configured to reverse the high frequency emphasis applied to the audio signal, wherein the high frequency de-emphasis uses a de-emphasis curve of more than 11 dB in the analog domain.
3 more elements
An audio device for improving sonic quality of an audio signal, the device comprising:
- a. an emphasis component that inputs the audio signal and performs a high frequency emphasis on the audio signal producing an emphasized audio signal;
- b. a digital to analog converter coupled with the emphasis component, wherein the digital to analog converter converts the emphasized audio signal to analog producing an emphasized analog audio signal;
- and
- c. a de-emphasis component coupled to the digital to analog converter, wherein the de-emphasis component performs a high frequency de-emphasis on the emphasized analog audio signal in the analog domain producing an output audio signal, wherein the de-emphasis is configured to reverse the high frequency emphasis applied to the audio signal, wherein the high frequency de-emphasis uses a de-emphasis curve of more than 11 dB in the analog domain;
- and
- d. an interpolation component coupled between the emphasis component and the digital to analog converter, wherein the interpolation component interpolates the emphasized audio signal by digitally upsampling the emphasized audio signal.
3 more elements
An audio system for improving sonic quality of an audio signal, the system comprising:
- a. an audio source that stores the audio signal or inputs the audio signal;
- and
- b. an audio processing element coupled with the audio source, comprising:
- i. an emphasis component that inputs the audio signal and performs a high frequency emphasis on the audio signal producing an emphasized audio signal;
- ii. a digital to analog converter coupled with the emphasis component, wherein the digital to analog converter converts the emphasized audio signal to analog producing an emphasized analog audio signal;
- and
- iii. a de-emphasis component coupled to the digital to analog converter, wherein the de-emphasis component performs a high frequency de-emphasis on the emphasized analog audio signal in the analog domain producing an output audio signal, wherein the de-emphasis is configured to reverse the high frequency emphasis applied to the audio signal, wherein the high frequency de-emphasis uses a de-emphasis curve of more than 11 dB in the analog domain;
- and
- iv. an interpolation component coupled between the emphasis component and the digital to analog converter, wherein the interpolation component interpolates the emphasized audio signal by digitally upsampling the emphasized audio signal.
6 more elements
A method of improving sonic quality of a digital audio signal comprising:
- a. receiving the digital audio signal;
- b. performing a high frequency emphasis on the audio signal in the digital domain producing a digital emphasized audio signal;
- c. interpolating the digital emphasized audio signal by digitally upsampling the digital emphasized audio signal;
- d. converting the digital emphasized audio signal to analog producing an analog emphasized audio signal;
- and
- e. performing a high frequency de-emphasis on the analog emphasized audio signal in the analog domain producing an output audio signal, wherein the de-emphasis is configured to reverse the high frequency emphasis applied to the audio signal, wherein the high frequency de-emphasis uses a de-emphasis curve of more than 11 dB in the analog domain.
3 more elements
Dependencies are inferred from the claim text.