Method, device and equipment for restoring sound field space and tracking attitude

A space and sound field technology, applied in frequency/direction characteristic devices, speaker space/structural arrangement, stereo system, etc., can solve the problems affecting the playback effect of panoramic sound, sound reproduction effect does not conform to the mode effect, etc., to achieve a good sound field space Effect

Pending Publication Date: 2022-03-11
CHINA RES INST OF FILM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when watching movies with headphones as the sound reproduction unit, the actual sound reproduction effect does not conform to the actual sound reproduction mode effect through speakers, which greatly affects the panoramic sound playback effect

Method used

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  • Method, device and equipment for restoring sound field space and tracking attitude
  • Method, device and equipment for restoring sound field space and tracking attitude
  • Method, device and equipment for restoring sound field space and tracking attitude

Examples

Experimental program
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Embodiment 1

[0050] In this example, if figure 1 with figure 2 As shown, a method for restoring sound field space and attitude tracking is provided, the method comprising:

[0051] Step S101, judging the input audio format, if it is audio in Ambisonic format, proceed directly to step 2; if it is audio based on channel, perform spatial sound field rendering on the audio based on channel and convert it into audio in Ambisonic format; If the object audio of the location information metadata is used, the object audio is converted into an ambisonic format audio.

[0052] Step S102 , acquiring the user's head posture parameters in real time, and performing sound source azimuth rendering on the audio in the ambisonics format.

[0053] Step S103 , performing binaural processing on the ambisonics signal obtained after performing sound source orientation restoration and rendering, and outputting an audio signal of panoramic sound for playback by earphones.

[0054] Further, the spatial sound fie...

Embodiment 2

[0079] In this embodiment, it corresponds to a method of restoring the sound field space and posture tracking in the first embodiment above, such as Figure 5 As shown, a device for restoring the sound field space and attitude tracking is provided, and the device includes:

[0080]Audio format judging module 501, for judging the input audio format, if it is the Ambisonic format audio then the input audio will be directly sent to the sound source orientation restoration rendering module 502; if it is the audio based on the channel, then the audio based on the channel Perform spatial sound field rendering and convert to Ambisonic format audio, and send the obtained Ambisonic format audio to the sound source position restoration rendering module 502; if it is an object audio containing position information metadata, then convert the object audio to Ambisonic format audio, And send to the sound source direction restoration rendering module 502.

[0081] The sound source azimuth r...

Embodiment 3

[0108] In this embodiment, corresponding to the device for restoring the sound field space and posture tracking described in Embodiment 2, an application mode of the device for restoring the sound field space and posture tracking is provided, such as Image 6 As shown, the device can be an earphone unit with a gyroscope or a VR headset, or it can be split into an external independent attitude perception module for use with ordinary earphones.

[0109] The device provided in this embodiment can adaptively adjust the panoramic sound content by combining the spatial parameters of the simulated playback theater, playback content, earphone attitude data, etc. during the sound reproduction process, thereby effectively improving the panoramic sound playback effect.

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Abstract

The invention discloses a method, a device and equipment for restoring a sound field space and tracking an attitude. The method provided by the invention comprises the following steps: judging an input audio format, if the input audio format is an Ambisonic format audio, directly carrying out the next step, if the input audio format is a sound channel-based audio, carrying out space sound field rendering on the audio and converting the audio into the Ambisonic format audio, and if the input audio format is an object audio, converting the audio into the Ambisonic format audio; acquiring head posture parameters of the user in real time in a sound restoration process, and performing sound source orientation restoration rendering on the Ambisonics format audio; and finally, binaural processing is carried out to obtain a panoramic sound audio signal for earphone playing. The method fully considers the space influence of a cinema when the sound field space rendering is carried out on the audio based on the sound channel, better restores the sound field space, realizes the corresponding adjustment of the sound source orientation in the earphone sound returning process, achieves the purpose of tracking the sound source in real time, and improves the sound quality. Therefore, when sound is returned through the earphone, the sound returning mode effect of a loudspeaker in reality is better met.

Description

technical field [0001] The present application relates to the technical field of sound processing, in particular to a method, device and equipment for restoring sound field space and posture tracking. Background technique [0002] The traditional way of watching movies in theaters is very popular with the public. However, due to the uneven distribution of theaters and the need for stricter infrastructure and hardware environment for the construction of movie halls, the way of watching movies is becoming more and more diversified. For example, the more flexible "viewing and projection" method using mobile smart devices or earphones as the sound reproduction unit has gradually emerged, and this viewing method also has a considerable audience. The advantages of using earphones for outdoor or outdoor viewing and sound reproduction are obvious: on the one hand, the closed sound output makes noise pollution almost zero, and it is easier to promote to noise-sensitive areas such as ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04R3/00H04R5/02H04R1/40H04S3/00
CPCH04R3/00H04R5/02H04R1/403H04S3/00
Inventor王薇娜张鑫崔强高峰王惠
OwnerCHINA RES INST OF FILM SCI & TECH