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

Patent metadata

Field	Value
Publication number	US-9369164-B2
Application number	US-65163307-A
Country	US
Kind code	B2
Filing date	Jan 10, 2007
Priority date	Jan 11, 2006
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

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. A method of generating a stereo signal from a mono down-mixed signal by using at least one processing device, the method comprising:
calculating 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;
generating a first matrix for generating a direct signal and an input signal of a decorrelator;
generating a second matrix, by using the calculated first spatial parameter;
generating the direct signal and the input signal of the decorrelator, by using the first matrix and the mono down-mixed signal;
decorrelating the input signal of the decorrelator; and
mixing the direct signal and the decorrelated signal, by using the second matrix, to generate the stereo signal.

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

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

4. A method of generating a stereo signal from a mono down-mixed signal by using at least one processing device, the method comprising:
calculating 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;
generating, using a first operation set and the mono down-mixed signal, a signal to be decorrelated and at least one direct signal to be input to a second operation set, at least one of the first and second operation sets being determined by the calculated first spatial parameter;
decorrelating the signal to be decorrelated; and
mixing the direct signal and the decorrelated signal, by using the second operation set, to generate the stereo signal.

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

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

Assignees

• Kim Junghoe
• Oh Eunmi
• Choo Kihyun
• Lei Miao
• Samsung Electronics Co Ltd

Inventors

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

Classifications

• H04B1/1646 Primary

  adapted for the reception of stereophonic signals · 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

• 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

• H04S2420/01

  Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD] · CPC title