Tonsignalabwärtsmischverfahren, Tonsignalcodierungsverfahren, Tonsignalabwärtsmischvorrichtung, Tonsignalcodierungsvorrichtung und Programm

Details

Veröffentlichungs-Nr.

EP4730844

Anmeldetag

1. September 2021

Veröffentlichung

22. April 2026

Rechtsraum

EP

IPC

G10L19/008, H04S3/00H04S3/00

Abstract

A sound signal downmixing method includes a delayed crosstalk addition step of obtaining, for each of two channels, a signal obtained by adding an input sound signal of one channel to a signal obtained by delaying an input sound signal of the other channel and multiplying the delayed input sound signal by a weight value that is a predetermined value having an absolute value smaller than 1, as a delayed crosstalk-added signal of the one channel, a left-right relationship information acquisition step of obtaining preceding channel information that is information indicating which of the delayed crosstalk-added signals of the two channels is preceding and a left-right correlation value that is a value indicating a magnitude of correlation between the delayed crosstalk-added signals of the two channels, and a downmixing step of obtaining a downmix signal by performing weighted addition on the input sound signals of the two channels based on the left-right correlation value and the preceding channel information such that more of an input sound signal of a preceding channel among the input sound signals of the two channels is included as the left-right correlation value becomes larger.

Anmelder

Firma

NTT, Inc.

Land

🇯🇵 Japan