Method, medium, and system decoding and encoding a multi-channel signal

Patent metadata

Field	Value
Publication number	US-9706325-B2
Application number	US-201615180930-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Jan 11, 2006
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A method, medium, and system decoding and/or encoding multiple channels. Accordingly, down-mixed multiple channels can be decoded/up-mixed to a left channel and a right channel during a first stage, thereby enabling a high quality sound output even in scalable channel decoding.

First claim

What is claimed is:

1. An apparatus for generating a stereo signal from a mono down-mixed signal, the apparatus comprising:
at least one processing device configured to:
calculate a first spatial parameter for up-mixing the mono down-mixed signal to the stereo signal, based on a second spatial parameter for up-mixing the mono down-mixed signal to a multi-channel signal other than the stereo signal;
generate a first matrix for generating a direct signal and an input signal of a decorrelator;
generate a second matrix, by using the calculated first spatial parameter;
generate the direct signal and the input signal of the decorrelator, based on the first matrix and the mono down-mixed signal;
decorrelate the input signal of the decorrelator; and
mix the direct signal and the decorrelated signal, based on the second matrix, to generate the stereo signal.

2. The apparatus of claim 1 , wherein the stereo channel is determined based on a channel configuration of a decoder.

3. The apparatus of claim 1 , wherein the second matrix is obtained based on a calculated channel level difference (CLD) and a calculated inter-channel correlation (ICC).

4. An apparatus for generating a stereo signal from a mono down-mixed signal, the apparatus comprising:
at least one processing device configured to:
calculate a first spatial parameter for up-mixing the mono down-mixed signal to the stereo signal, based on a second spatial parameter for up-mixing the mono down-mixed signal to a multi-channel signal other than the stereo signal;
generate, using a first operation set and the mono down-mixed signal, an input signal of a decorrelator and a direct signal to be input to a second operation set, the second operation set being determined by the calculated first spatial parameter;
decorrelate the input signal of the decorrelator; and
mix the direct signal and the decorrelated signal, based on the second operation set, to generate the stereo signal.

5. The apparatus of claim 4 , wherein the stereo signal is determined based on a channel configuration of a decoder.

6. The apparatus of claim 4 , wherein the second operation set is obtained based on a calculated channel level difference (CLD) and a calculated inter-channel correlation (ICC).

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Junghoe
• Oh Eunmi
• Choo Kihyun
• Lei Miao

Classifications

• H04S5/005 Primary

  of the pseudo five- or more-channel type, e.g. virtual surround · 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

• H04S3/00

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

• H04B1/1646

  adapted for the reception of stereophonic signals · 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