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3D audio encoding acceleration method based on assembly line

A three-dimensional audio and pipeline technology, applied in speech analysis, instruments, etc., can solve the problems of 3D audio channel number surge and large data volume

Inactive Publication Date: 2015-12-30
SHANGHAI DATACENT SCI CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In order to obtain better 3D sound effects, it is necessary to increase the number of channels to the maximum. The increase in the number of channels makes 3D audio face many challenges: the surge in the number of 3D audio channels makes its data volume very large

Method used

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  • 3D audio encoding acceleration method based on assembly line

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Embodiment Construction

[0015] This pipeline-based three-dimensional audio coding acceleration method includes the following steps:

[0016] 1) Transforming the multi-channel time-domain signal into a frequency-domain signal;

[0017] 2) dividing the frequency domain signal of each sound channel into a plurality of subbands;

[0018] 3) Acquire the energy of each sub-band, and sequentially combine the sub-band energies corresponding to the three adjacent channels into the first type of channel unit, if the remaining adjacent channels are less than three, then combine the remaining adjacent channels corresponding to The sub-band energy of is combined into the second type of channel unit;

[0019] 4) Encoding the channel units of the first type and the second type respectively, quantizing the encoding result and generating a transformation matrix index corresponding to each channel unit;

[0020] 5) Combining the above four steps into a four-stage pipeline structure to accelerate three-dimensional au...

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Abstract

The invention discloses a 3D audio encoding acceleration method based on an assembly line, comprising the specific steps as follows: transforming time-domain signals of multiple channels into frequency-domain signals; dividing the frequency-domain signal of each channel into multiple sub bands; acquiring the energy of each sub band, sequentially combining the energy of the sub bands corresponding to three adjacent channels into a first-category channel unit, and combining the energy of the sub bands corresponding to the remaining adjacent channels into a second-category channel unit if the number of the remaining adjacent channels is less than three; encoding the first-category channel units and the second-category channel unit, quantifying the encoding result, and generating transformation matrix indexes corresponding to the channel units respectively; and making the four steps constitute a four-level assembly line structure to carry out 3D audio encoding acceleration.

Description

technical field [0001] The invention relates to a pipeline-based three-dimensional audio coding acceleration method Background technique [0002] Audio-visual has entered the three-dimensional era. In order to achieve a better audio-visual experience, a three-dimensional sound field auditory effect synchronized with the three-dimensional video content is required to truly achieve an immersive audio-visual experience. In recent years, Japan's NHK company has launched a 22.2-channel system, which can reproduce the original three-dimensional sound field through 24 speakers. In 2011, MPEG started to formulate an international standard for 3D audio. While achieving a certain coding efficiency, it hopes to restore the 3D sound field with fewer speakers, so that this technology can be extended to mobile terminals. [0003] In order to obtain better 3D sound effects, the number of channels needs to be increased to the maximum. The increase in the number of channels makes 3D audio f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/035G10L19/24G10L25/18
Inventor 张军
Owner SHANGHAI DATACENT SCI CO LTD
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