Encoding/decoding apparatus for processing channel signal and method therefor

Patent metadata

Field	Value
Publication number	US-10068579-B2
Application number	US-201414758642-A
Country	US
Kind code	B2
Filing date	Jan 15, 2014
Priority date	Jan 15, 2013
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

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 of loudspeakers and object signals;
an object renderer to render the object signals and to output first rendered object signals;
an object metadata (OAM) decoder to decode an object metadata, wherein the object renderer uses the object metadata and generates an object waveform based upon a given reproduction format;
a Spatial Audio Object Coding (SAOC) 3D decoder to output second rendered object signals based upon decoded SAOC transport channel and parametric information, and to output an audio scene based upon a reproduction layout, and the object metadata; and
a mixer to perform delay alignment and sample-wise addition for the object waveform generated by the object renderer when discrete/parametric objects are decoded in the USAC 3D decoder.

2. The decoding apparatus of claim 1 , wherein the channel signals are rendered based upon a vertical angle and a horizontal angle.

3. A decoding method, comprising:
outputting channel signals of loudspeakers and object signals in a Unified Speech and Audio Coding (USAC) three-dimensional (3D) decoder;
rendering the object signals in an object renderer, and outputting first rendered object signals;
decoding the object metadata in an object metadata (OAM) decoder;
generating an object waveform according to a given reproduction format by using the object metadata;
outputting second rendered object signals based upon decoded Spatial Audio Object Coding (SAOC) transport channel and parametric information, and outputting an audio scene based upon a reproduction layout, and the object metadata in a SAOC 3D decoder; and
performing delay alignment and sample-wise addition for the object waveform generated by the object renderer, in a mixer, when discrete/parametric objects are decoded in the USAC 3D decoder.

4. The decoding method of claim 3 , wherein the channel signals are rendered based upon a vertical angle and a horizontal angle.

5. The decoding method of claim 4 , wherein the object renderer computes a panning gain for the object signals.

6. The decoding method of claim 5 , wherein the panning gain between pairs of adjacent time stamps is linearly interpolated.

7. The decoding method of claim 5 , wherein the panning gain is computed based upon a triangle mesh including vertexes for a loudspeaker.

8. The decoding method of claim 3 , wherein the object signals have a position_azimuth, position_elevation, position_radius and gain_factor in a time stamp.

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

• H04S3/00

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

• H04S2400/09

  Electronic reduction of distortion of stereophonic sound systems · CPC title

• H04S7/306

  For headphones · CPC title

• H04S3/006

  in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems · CPC title