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Multi-channel decoding system and method thereof

An audio decoding and multi-channel technology, which is applied in two-channel systems, stereo systems, speech analysis, etc., can solve problems such as noise and achieve the effect of reducing noise

Active Publication Date: 2012-10-24
XUESHAN TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned "pop" noise problem, the present invention proposes a multi-channel audio decoding system and a multi-channel audio decoding method, which can reduce the "pop" noise when switching between different modes

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[0017] Certain terms are used in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0018] image 3 It is a schematic diagram of a multi-channel audi...

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Abstract

The invention relates to a multi-channel audio decoding system and a method thereof. The multi-channel audio decoding method comprises the steps of receiving an audio input signal to generate a first channel audio output signal and a second channel audio output signal, wherein the audio input signal is mixed with a specific clock signal; and gradually changing an amplitude of the specific clock signal from a first value to a second value when switching from a first mode corresponding to a first number of channels to a second mode corresponding to a second number of channels. The multi-channel audio decoding system and the method thereof can reduce the effect of bang noise when switching different modules by adjusting amplitude of the specific clock signal.

Description

technical field [0001] The present invention relates to multi-channel decoding schemes, and in particular to a multi-channel audio decoding system and method thereof capable of reducing noise when switching between different channel modes. Background technique [0002] Generally speaking, when a multi-channel decoding system switches from multi-channel mode to single-channel mode or from single-channel mode to multi-channel mode, users often hear "pop" noise from headphones or speakers ("pop" noise) ( the sonic phenomenon). This is mainly because the output DC (Direct Current, DC) voltage levels of the channel output signals generated from the multi-channel decoding system are different in the multi-channel and single-channel modes. Another reason may be caused by the glitch phenomenon when switching between multi-channel and single-channel modes. Taking a stereo decoding system as an example, when the stereo decoding system switches between stereo and mono modes, users of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00H04S1/00H04S3/00
CPCH04H40/81
Inventor 陈界弘李宗霖傅家煌
Owner XUESHAN TECH INC