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Method and system for processing multi-rate audio from a plurality of audio processing sources

An audio signal and signal processing technology, applied in transmission systems, stereo systems, dual-channel systems, etc., can solve problems such as complex audio signal sources

Active Publication Date: 2008-06-18
AVAGO TECH INT SALES PTE LTD
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Problems solved by technology

Furthermore, these added functions and / or capacities need to be implemented in a flexible and efficient manner, which complicates the operational requirements, communication technologies and the wide range of audio sources supported by mobile phones

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  • Method and system for processing multi-rate audio from a plurality of audio processing sources
  • Method and system for processing multi-rate audio from a plurality of audio processing sources
  • Method and system for processing multi-rate audio from a plurality of audio processing sources

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Embodiment Construction

[0059]The present invention relates to methods and systems for processing multi-rate audio from multiple audio processing sources. Aspects of the invention may include an audio encoder / decoder (codec) in a wireless device for upsampling two or more audio signals to the same data sampling rate. Each audio signal, such as digital audio, digital voice, and digital multi-tone ringer, may be received at one of multiple data sampling rates. These audio signals can be equalized and / or compensated using FIR filters or IIR filters prior to upsampling. Upsampling can be achieved using multiple half-band interpolation operations. For example, the gain of the acquired upsampled data can be dynamically adjusted using ramp-up or ramp-down to reduce noise effects. The left and right channels of the upsampled audio signal may be mixed and later upsampled further for transmission to an output device. The up-sampled mixed audio signal may be down-sampled for transmission to, for example, a B...

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Abstract

The present invention discloses a method and system for processing multi-rate audio from multiple audio processing sources. Audio codecs in wireless devices can be used to upsample two or more audio signals to the same data sampling rate. Each audio signal, such as digital audio, speech and multi-tone ringtones, may be received at at least one of a plurality of data sampling rates. Before upsampling, the audio signal can be equalized and / or compensated using FIR filters or using IIR filters to reduce overall processing response time. Multiple half-band interpolation operations may accomplish the upsampling. The first half-band filter can be replaced by an IIR filter to reduce the overall processing response time. The gain of the upsampled data can be adjusted to reduce noise effects. The channels of the upsampled audio signal are mixed and then further upsampled for delivery to an output device. The up-sampled mixed audio signal may be down-sampled for transmission to a Bluetooth radio.

Description

technical field [0001] The present invention relates to audio signal processing, and more particularly, to a system and method for processing multi-rate audio from multiple audio processing sources. Background technique [0002] In audio applications, systems providing audio interfacing and processing may need to support duplex operation, which may include the ability to use The processed signal drives a speaker, earpiece, or other type of output device. To perform these operations, the system may use audio encoding and decoding (codec) equipment that provides appropriate gain, filtering, and and / or analog-to-digital conversion, and may also provide suitable gain, filtering and / or digital-to-analog conversion in the downlink direction towards the output device. [0003] With the expansion of audio applications, for example, as new video and / or audio compression technologies and formats are developed and embedded in wireless systems (such as mobile phones), new multimedia d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B14/04H03H17/02
CPCH04S2400/13H04S1/007G10L19/18G10L13/00G11B20/10H03H17/00
Inventor 孔洪玮曾怀怡纳尔逊·索伦伯格苌立枫程泰亚克劳德·海克
Owner AVAGO TECH INT SALES PTE LTD
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