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Adjusting dynamic range for audio reproduction

A dynamic range, audio system technology, applied in the direction of compression/expansion, amplification control, combination of control types, etc. in non-tuned/low-frequency amplifier volume

Inactive Publication Date: 2014-02-19
BOSE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation is especially problematic for symphonies which can have a dynamic range above 80dB

Method used

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  • Adjusting dynamic range for audio reproduction
  • Adjusting dynamic range for audio reproduction
  • Adjusting dynamic range for audio reproduction

Examples

Experimental program
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Embodiment Construction

[0017] refer to figure 1 , the vehicle 100 includes an audio reproduction system 102 capable of automatically adjusting the dynamic range, eg, as a function of time and frequency. Although the system 102 is illustrated as being implemented in a vehicle 100, the system may be implemented in other types of vehicles (e.g., airplanes, buses, etc.) and environments (e.g., residences, business offices, restaurants, stadiums) that are susceptible to noise etc.) are implemented. In some arrangements, the system 102 may also be used to adjust the dynamic range for listening environments without significant background noise. For example, sound channels may be adjusted for late night movie viewing so as not to disturb non-viewers (eg, sleeping children) but still provide audible content.

[0018] The audio reproduction system 102 basically adapts the dynamic range of recorded and broadcast music (or other types of audio content) into a desired output dynamic range bounded by the availa...

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PUM

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Abstract

An audio reproduction system substantially fits the dynamic range of recorded and broadcast music (or other type of audio content) into a desired output dynamic range, bounded by the available dynamic range of the listening environment. In some scenarios the output dynamic range may be defined as a function of the ambient noise level present in the environment and the maximum output capabilities of audio system. A listener may adjust the desired prominence of the program with a user control, with foreground (louder and more dynamic) as one extreme and background (quieter and less dynamic) as the other extreme. A control to adjust prominence, when used to provide background reproduction, may reduce the average volume of a reproduced signal and fit the input signal dynamic range into a suitably smaller but desired output signal dynamic range.

Description

technical field [0001] The invention relates to adjusting the dynamic range for an audio reproduction signal. Background technique [0002] In many situations where people listen to recorded or broadcast speech or music, it is difficult to hear both loud and soft parts of the program with the same volume control setting. In a noisy listening environment (eg, the passenger cabin of a vehicle), when loud passages are turned up enough to be audible relative to the noise, soft passages are masked by the noise and inaudible. This situation is especially problematic for symphonies which may have a dynamic range above 80dB. In a quiet listening situation (eg, late night listening at home), loud passages may be loud enough to wake other family members or neighbors when soft passages are set at a comfortable background listening level. [0003] Additionally, changing noise levels provide an even more unpleasant listening experience. In a moving vehicle, opening a window can drasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/32H03G7/00
CPCH03G3/32H03G7/002H03G9/025
Inventor W·R·硕特
Owner BOSE CORP