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Method and device for determining inter-channel time difference parameter

A technology of time difference between channels and channels, applied in stereo systems, speech analysis, electrical components, etc., can solve problems such as large amount of calculation, increase performance requirements of the encoding end, affect processing efficiency, etc., to reduce performance requirements and reduce search. The amount of calculation and the effect of improving processing efficiency

Active Publication Date: 2016-10-19
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] However, the above-mentioned large search range causes a large amount of calculation in the process of determining ITD parameters in the frequency domain in the prior art, which increases the performance requirements of the encoding end and affects the processing efficiency.

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] figure 1 It is a schematic flowchart showing a method 100 for determining a time difference parameter between channels according to an embodiment of the present invention. The execution body of the method 100 may be an encoding end device (also referred to as a sending end device) that transmits an audio signal, Such as figure 1 As shown, the method 100 includes:

[0028] S110. Determine a reference parameter according to the time-domain signa...

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Abstract

The invention provides a method and a device for determining an inter-channel time difference parameter wherein calculation amount of a time difference parameter searching calculating process in a stereo coding process can be reduced. The method comprises the following steps of determining a reference parameter according to a time domain signal of a first sound channel and a time domain signal of a second sound channel, wherein the reference parameter corresponds with an acquiring sequence between the time domain signal of the first sound channel and the time domain signal of the second sound channel, and the time domain signal of the first sound channel and the time domain signal of the second sound channel correspond with a same period; determining a searching range according to a reference parameter and a limit value Tmax, wherein the limit value Tmax is determined according to the sampling rate of the time domain signal of the first sound channel, and the searching range belongs to [-Tmax,0] or [0,Tmax]; and performing searching based on the frequency domain signal of the first sound channel and the frequency domain signal of the second sound channel, thereby determining a first inter-channel time difference (ITD) parameter which corresponds with the first sound channel and the second sound channel.

Description

technical field [0001] The present invention relates to the field of audio processing, and more particularly, to a method and device for determining time difference parameters between channels. Background technique [0002] As the quality of life improves, people's demand for high-quality audio continues to increase. Compared with mono audio, stereo audio has a sense of orientation and distribution of each source, and can improve the clarity and intelligibility of information, so it is favored by people. [0003] At present, a transmission technology for stereo audio signals is known. The encoding end converts the stereo signals into mono audio signals and parameters such as inter-channel time difference (ITD, Inter-Channel Time Difference), and encodes and transmits them respectively. For the decoding end, after obtaining the mono audio signal, the decoding end further restores the stereo signal according to parameters such as ITD, so that the low-bit high-quality transmis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008G10L25/54G10L25/03
CPCG10L19/008G10L19/08G10L25/03H04S3/00G10L19/022
Inventor 张兴涛苗磊
Owner HUAWEI TECH CO LTD
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