Encoding/decoding apparatus for processing channel signal and method

Patent metadata

Field	Value
Publication number	US-11875802-B2
Application number	US-202217706400-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Jan 15, 2013
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

An encoding/decoding apparatus and method for controlling a channel signal is disclosed, wherein the encoding apparatus may include an encoder to encode an object signal, a channel signal, and rendering information for the channel signal, and a bit stream generator to generate, as a bit stream, the encoded object signal, the encoded channel signal, and the encoded rendering information for the channel signal.

First claim

The invention claimed is:

1. A decoding apparatus, comprising:
a Unified Speech and Audio Coding (USAC) three-dimensional (3D) decoder to output channel signals and object signals, wherein the object signals include discrete object signals;
an object metadata (OAM) (object metadata) decoder to decode an object metadata; and
an object renderer to generate an object waveform according to a given reproduction format using the object metadata, wherein the each of the discrete object signals is rendered into output channel signals for loudspeakers based upon the object metadata,
wherein when an arrangement of the loudspeakers is not spherical, time compensation and level compensation is performed for the arrangement of the loudspeakers, and
wherein the channel signals are controlled based on control information to control a volume or a gain of the channel signals, control information to control a horizontal rotation of the channel signals, and control information to control a vertical rotation of the channel signals.

2. The decoding apparatus of claim 1 , further comprising:
a Spatial Audio Object Coding (SAOC) 3D decoder to restore the object signals and the channel signals from a decoded SAOC transport channel and parametric information, and to output an audio scene based upon a reproduction layout and the object metadata.

3. The decoding apparatus of claim 1 , further comprising:
a mixer to perform delay alignment and sample-wise addition for the object waveform.

4. The decoding apparatus of claim 1 , further comprising:
a format converter to perform format conversion between a configuration of the channel signals and a desired speaker reproduction format.

5. The decoding apparatus of claim 4 , wherein the format converter is suitable for a random configuration for a nonstandard loudspeaker configuration, and a standard loudspeaker configuration.

6. The decoding apparatus of claim 1 , further comprising:
a binaural renderer to perform binaural downmixing of the channel signals.

7. The decoding apparatus of claim 1 , wherein the Unified Speech and Audio Coding (USAC) three-dimensional (3D) decoder generates channel mapping information and object mapping information based upon geometric information or semantic information for the channel signals and the object signals.

8. The decoding apparatus of claim 7 , wherein the channel mapping information and the object mapping information indicate how the channel signals and the object signals map with channel elements including channel pair elements (CPEs), single channel elements (SCEs), and low frequency effects (LFEs).

9. A decoding method, comprising:
outputting, by a Unified Speech and Audio Coding (USAC) three-dimensional (3D) decoder, channel signals and object signals, wherein the object signals including discrete object signals;
decoding, by an object metadata (OAM) decoder, an object metadata; and
generating, by an object renderer, an object waveform according to a given reproduction format using the object metadata, wherein the each of the object signals is rendered into output channel signals for loudspeakers based upon the object metadata,
wherein when an arrangement of the loudspeakers is not spherical, time compensation and level compensation is performed for the arrangement of the loudspeakers,
wherein the channel signals are controlled based on control information to control a volume or a gain of the channel signals, control information to control a horizontal rotation of the channel signals, and control information to control a vertical rotation of the channel signals.

10. The decoding method of claim 9 , further comprising:
restoring, by a Spatial Audio Object Coding (SAOC) 3D decoder, the object signals and the channel signals from a decoded SAOC transport channel and parametric information, and to output an audio scene based upon a reproduction layout, and the object metadata.

11. The decoding method of claim 9 , further comprising:
performing, by a mixer, delay alignment and sample-wise addition for the object waveform.

12. The decoding method of claim 9 , further comprising:
performing, by a format converter, format conversion between a configuration of the channel signals and a desired speaker reproduction format.

13. The decoding method of claim 12 , wherein the format converter is suitable for a random configuration for a nonstandard loudspeaker configuration, and a standard loudspeaker configuration.

14. The decoding method of claim 9 , further comprising:
performing, by a binaural renderer, binaural downmixing of the channel signals.

15. The decoding method of claim 9 , wherein the Unified Speech and Audio Coding (USAC) three-dimensional (3D) decoder generates channel mapping information and object mapping information based upon geometric information or semantic information for the channel signals and the object signals.

16. The decoding method of claim 15 , wherein the channel mapping information and the object mapping information indicate how the channel signals and the object signals map with channel elements including channel pair elements (CPEs), single channel elements (SCEs), and low frequency effects (LFEs).

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Seo Jeong Il
• Beack Seung Kwon
• Jang Dae Young
• Kang Kyeong Ok
• Park Tae Jin
• Lee Yong Ju
• Choi Keun Woo
• Kim Jin Woong

Classifications

• 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

• H04S3/00

  Systems employing more than two channels, e.g. quadraphonic (H04S5/00, H04S7/00 take precedence) · CPC title

• H04S3/02

  of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other · CPC title

• H04S3/008

  in which the audio signals are in digital form, i.e. employing more than two discrete digital channels (data reduction aspects thereof based on psychoacoustics G10L19/02) · CPC title

• H04S2420/03

  Application of parametric coding in stereophonic audio systems · CPC title