Audio distribution

An audio signal distribution and audio technology, which is applied in the direction of public address systems, sounding equipment, instruments, etc., can solve problems such as unwillingness to provide prices

Inactive Publication Date: 2005-07-27
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, consumers are unwilling to pay for digital music players that are severely limited because of digital music availability, and are unwilling to pay for digital music that does not offer the advantages of price, quality, or options available on other media such as CDs. Payment

Method used

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Embodiment Construction

[0046] In the present invention, a set of head related transfer functions (HRTF) is used to personalize audio processing for a specific person. HRTF is defined as a function that describes how sound travels from a specific sound source to the ear, and the number of HRTFs belonging to a group can be an HRTF that describes the sound propagation from a sound source to the ear, or it can be based on the sound source that delivers the sound Multiple HRTFs for number and number of ears.

[0047] HRTF is defined below. By finding the sound pressure at the eardrum produced by a given sound source (accounting for distances such as the shape of the ear and the outer ear), all that is required is the impact response from the sound source to the eardrum, which can be measured by placing a microphone at the ear. This is called the head-related impulse response, and its Fourier transform is called the head-related transfer function (HRTF). HRTF captures all physical cues of sound source l...

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PUM

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Abstract

The present invention relates to a method for a service provider to distribute an audio signal to a listener. Before delivering the audio signal to the listener, the audio impression of the audio signal is personalized to the listener. The personalizing could e.g. be performed by filtering the audio signal using a set of head related transfer functions (HRTFs) defined by parameters being specific for the listener. This is for minimizing the interest of performing illegal copying of the audio signal. The invention further relates to a method of playing back a distributed audio signal and a playback device for playing back a distributed audio signal, where the personalization is detected and used as a watermark, which is identified and interpreted before playing back the distributed audio.

Description

technical field [0001] The present invention relates to a method of distributing music from a service provider to listeners. The invention also relates to a device for distributing music from a service provider to listeners. The invention also relates to a method of playing an assigned audio signal, and finally a device for playing an assigned audio signal. Background technique [0002] Recently, distribution of digital music over the Internet has gained popularity and effect. This is partly due to the widespread use of the MP3 compressed format, which allows relatively high quality reproduction of music using many music files small enough to be downloaded by a home user. Using MP3, a typical three-minute song can be compressed into a file size of about 2.5 to 3 megabytes, while maintaining a sound quality comparable to music played from a CD. A home user connected to the Internet using an inexpensive modem capable of transmitting 56 kilobytes per second can download song...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62G06F21/10G10K15/02H04R27/00H04S1/00
CPCH04R27/00H04S1/005H04S1/002G11B20/10
Inventor R·M·阿尔特斯D·W·E·舍班B·A·G·范鲁伊特
Owner KONINK PHILIPS ELECTRONICS NV
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