Method and apparatus for encoding a multi-channel audio, electronic device, and storage medium

Patent metadata

Field	Value
Publication number	US-12567422-B2
Application number	US-202318401257-A
Country	US
Kind code	B2
Filing date	Dec 29, 2023
Priority date	Jun 25, 2023
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

Provided are method and apparatus for encoding a multi-channel audio, an electronic device, and a storage medium. The method includes: determining encoding units of a multi-channel audio according to an audio type of the multi-channel audio; acquiring importance evaluation indexes of the encoding units of the multi-channel audio; determining encoding modes of the encoding units respectively according to the importance evaluation indexes; and encoding the encoding units in the multi-channel audio respectively based on the encoding modes.

First claim

What is claimed is:

1 . A method for encoding a multi-channel audio, comprising:
determining encoding units of the multi-channel audio according to an audio type of the multi-channel audio, wherein the audio type comprises a channel-based type, a scene-based type, and an object-based type; acquiring importance evaluation indexes of the encoding units of the multi-channel audio; determining encoding modes of the encoding units according to the importance evaluation indexes; and encoding the encoding units of the multi-channel audio respectively according to the encoding modes of the encoding units.

2 . The method of claim 1 , wherein the encoding units are channels, and the acquiring importance evaluation indexes of the encoding units of the multi-channel audio comprises:
acquiring an importance index table according to the audio type of the multi-channel audio when the audio type is the channel-based type or the scene-based type; and acquiring importance evaluation indexes of the channels of the multi-channel audio based on the importance index table.

3 . The method of claim 2 , wherein the acquiring the importance index table according to the audio type of the multi-channel audio comprises:
acquiring a multi-channel format of the multi-channel audio when the audio type of the multi-channel audio is the channel-based type; and acquiring the importance index table according to the multi-channel format.

4 . The method of claim 2 , wherein the acquiring importance evaluation indexes of the channels of the multi-channel audio based on the importance index table comprises:
acquiring a higher order Ambisonics (HOA) order of the multi-channel audio when the audio type of the multi-channel audio is the scene-based type; determining a number of the channels of the multi-channel audio based on the HOA order; and acquiring, from the importance index table, the importance evaluation indexes of the channels of the multi-channel audio according to the number of the channels.

5 . The method of claim 1 , wherein the encoding units are objects, and the acquiring importance evaluation indexes of the encoding units of the multi-channel audio comprises:
acquiring importance evaluation indexes of the objects of a to-be-encoded multi-channel audio according to a preset professional database when the audio type of the multi-channel audio is the object-based type.

6 . The method of claim 1 , wherein the determining the encoding modes of the encoding units according to the importance evaluation indexes comprises:
acquiring a first encoding-mode index table according to a network bandwidth; and acquiring, from the first encoding-mode index table, the encoding modes of the encoding units according to the importance evaluation indexes.

7 . The method of claim 1 , wherein the determining the encoding modes of the encoding units according to the importance evaluation indexes comprises:
acquiring a reserved storage space size for an encoded multi-channel audio; determining an average storage space size for audio per unit time according to the reserved storage space size; acquiring a second encoding-mode index table according to the average storage space size for audio per unit time; and acquiring, from the second encoding-mode index table, the encoding modes of the encoding units according to the importance evaluation indexes.

8 . An apparatus for encoding a multi-channel audio in a mixed mode, comprising:
a first determination module configured to determine encoding units of the multi-channel audio according to an audio type of the multi-channel audio, wherein the audio type includes a channel-based type, a scene-based type, and an object-based type; an acquisition module configured to acquire importance evaluation indexes of the encoding units of the multi-channel audio; a second determination module configured to determine encoding modes of the encoding units respectively according to the importance evaluation indexes of the encoding units; and an encoding module configured to encode the encoding units in the multi-channel audio respectively based on the encoding modes of the encoding units.

9 . An electronic device, comprising a memory and a processor, wherein
the processor is configured to execute a computer program stored in the memory; and the processor, when executing the computer program, performs the method of claim 1 .

Assignees

• Aac Acoustic Tech Shanghai Co Ltd

Inventors

• Sun Xuejing
• Hui Mingxin

Classifications

• G10L19/22

  Mode decision, i.e. based on audio signal content versus external parameters · CPC title

• G10L19/008 Primary

  Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing · CPC title