US 11,380,338 B2 · Signal processing methods and apparatuses for enhancing sound quality

Abstract

Provided are a signal processing method and apparatus for enhancing sound quality. The signal processing method performed by a signal transmitting apparatus includes determining, based on a plurality of parameters, a valid bandwidth so as to encode an input signal; performing pre-processing on the input signal, based on the valid bandwidth; and encoding the pre-processed input signal, based on the valid bandwidth, and the signal processing method performed by a signal receiving apparatus includes decoding a bitstream or a packet received via a transmission channel; determining a valid bandwidth, based on a plurality of parameters used in the decoding; and performing post-processing on a decoded signal, based on the valid bandwidth.

Claims6

Dependent claims

A signal processing method comprising:

decoding a bitstream or a packet received via a transmission channel to generate an output signal including at least one of an audio signal and a speech signal;
determining a valid bandwidth, based on a plurality of parameters used in the decoding;
obtaining a number of continuous frames having a same valid bandwidth;
when the number of continuous frames having the same valid bandwidth exceeds a threshold, performing post-processing on the output signal, based on the determined valid bandwidth;
and
when the number of continuous frames having the same valid bandwidth does not exceed the threshold, performing smoothing to the determined valid bandwidth and performing the post-processing on the output signal based on the smoothed valid bandwidth.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/037,128Filed 29 Sep 2020 · division

Priority

KR 10-2015-01258744 Sep 2015

Published

US 2021/0012786 A114 Jan 2021

Granted

5 Jul 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G10L 19/028
Using spectral analysis, e.g. transform vocoders or subband vocoders: noise substitution, i.e. substituting non-tonal spectral components by noisy…
G10L 19/22
Vocoders using multiple modes: mode decision, i.e. based on audio signal content versus external parameters
G10L 21/0208
Speech enhancement, e.g. noise reduction or echo cancellation: noise filtering
G10L 19/265
Pre-filtering or post-filtering: pre-filtering, e.g. high frequency emphasis prior to encoding

Family

PCT/KR2016/009935Parent of this division · filed 5 Sep 2016

US 2021/0012786 A1Pre-grant publication · published 14 Jan 2021

Application15/757,547Parent of this division

US 10,803,877 B2Parent of this division

US 2019/0027156 A1Published application

US 11,380,338 B2This patent

From the US filing history. Foreign family members aren’t listed.

Signal processing methods and apparatuses for enhancing sound quality

Life of this patent

Signal processing methods and apparatuses for enhancing sound quality

Life of this patent

Abstract

Claims6