Audio signal compression
AssigneeKoninklijke Philips Electronics N.V.
InventorsDerk Reefman, Petrus Antonius Cornelis Maria Nuijten
Life of this patent
Estimating the term…
Abstract
Estimating a compression gain obtainable in compressing a given audio signal, comprising extracting a signal power in a selected frequency band of the given audio signal, and obtaining an estimation of the compression gain by correlation with the extracted signal power.
Claims11
A method of estimating a compression gain obtainable in compressing a given audio signal, the method comprising the steps of:
- extracting a signal power in a selected frequency band of the given audio signal by a control device that controls adaptation of an adaptive sigma-delta modulator to produce a data-stream signal in Direct Stream Digital (DSD) format, and
- obtaining an estimation of the compression gain by correlation with the extracted signal power.
A method of recording an audio signal on a recording medium, the method comprising the steps of:
- compressing the audio signal to obtain a compressed audio signal,
- recording the compressed audio signal on the recording medium,
- the method further comprising:
- estimating a compression gain obtainable in the compressing step by extracting a signal power in a selected frequency band of the audio signal by a control device that controls adaptation of an adaptive sigma-delta modulator to produce a data-stream signal in Direct Stream Digital (DSD) format, and obtaining an estimation of the compression gain by correlation with the extracted signal power, controlling said compressing depending on said estimated compression gain.
A method of transmitting an audio signal, the method comprising the steps of:
- compressing the audio signal to obtain a compressed audio signal,
- transmitting the compressed audio signal over a transmission medium,
- the method further comprising:
- estimating a compression gain obtainable in the compressing step by extracting a signal power in a selected frequency band of the audio signal by a control device that controls adaptation of an adaptive sigma-delta modulator to produce a data-stream signal in Direct Stream Digital (DSD) format, and obtaining an estimation of the compression gain by correlation with extracted signal power,
- controlling said compressing depending on said estimated compression gain.
A device for estimating a compression gain obtainable in compressing a given audio signal, the device comprising:
- means for extracting a signal power in a selected frequency band of the given audio signal by a control device that controls adaptation of an adaptive sigma-delta modulator to produce a data-stream signal in Direct Stream Digital (DSD) format, and
- means for obtaining an estimation of the compression gain by correlation with the extracted signal power.
Dependencies are inferred from the claim text.