IP Library › Granted Patent US 12,361,957
Granted Patent B2
US 12,361,957 · App. 18/426,726 · Granted Jul 15, 2025

Unified speech/audio codec (USAC) processing windows sequence based mode switching

Inventors: Seungkwon Beack (Daejeong, KR); Tae Jin Lee (Daejeon, KR); Min Je Kim (Daejeon, KR); Kyeongok Kang (Daejeon, KR); Dae Young Jang (Daejeon, KR); Jeongil Seo (Daejeon, KR); Jin Woo Hong (Daejeon, KR); Chieteuk Ahn (Daejeon, KR); Ho Chong Park (Daejeon, KR); Young-cheol Park (Seoul, KR)
Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE; KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION
G10L19/22G10L19/022G10L19/06G10L19/18
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Quick Facts
Patent No.
US 12,361,957
App. No.
18/426,726
Granted
Jul 15, 2025
Kind
B2
Abstract

A Unified Speech and Audio Codec (USAC) that may process a window sequence based on mode switching is provided. The USAC may perform encoding or decoding by overlapping between frames based on a folding point when mode switching occurs. The USAC may process different window sequences for each situation to perform encoding or decoding, and thereby may improve a coding efficiency.

Claims (20)

1. A signal processing method processed by a processor, comprising:

identifying a first window for a previous frame of an input signal;

identifying a second window for a current frame of the input signal;

modifying a slope of a left portion of the second window based on the first window, and

processing the current frame using a modified second window having a modified left portion by performing overlap-add operation between the previous frame applied to the first window and the current frame applied to the modified second window, and

wherein the overlap-add operation is performed at a folding point with respect to the first window and the second window.

2. The signal processing method of claim 1 , wherein the slope of the left portion of the second window corresponds to a region for performing overlap-add operation with the first window.

3. The signal processing method of claim 1 , wherein the current frame is applied to a Linear Prediction Domain (LPD) mode and the previous frame is applied to a Frequency Domain (FD) mode.

4. The signal processing method of claim 1 , wherein the current frame is applied to a Linear Prediction Domain (LPD) mode and the previous frame is applied to the LPD mode.

5. The signal processing method of claim 1 , wherein the current frame is applied to Frequency Domain (FD) and the previous frame is applied to a Linear Prediction Domain (LPD) mode.

6. A signal processing method processed by a processor, comprising:

identifying a first window for a current frame of an input signal;

identifying a second window for a next frame of the input signal;

modifying a slope of a right portion of the first window based on the second window, and

processing the current frame using a modified first window having a modified right portion overlap-add operation between the current frame applied to the modified first window and the next frame applied to the second window, and

wherein the overlap-add operation is performed at a folding point with respect to the first window and the first window.

7. The signal processing method of claim 6 , wherein the slope of the right portion of the first window corresponds to a region for performing overlap-add operation with the second window.

8. The signal processing method of claim 6 , wherein the current frame is applied to a Linear Prediction Domain (LPD) mode and the next frame is applied to a Frequency Domain (FD) mode.

9. The signal processing method of claim 6 , wherein the current frame is applied to a Linear Prediction Domain (LPD) mode and the next frame is applied to the LPD mode.

10. The signal processing method of claim 6 , wherein the current frame is applied to Frequency Domain (FD) and the next frame is applied to a Linear Prediction Domain (LPD) mode.

Priority Claims (5)
KR 10-2008-0118230 · Nov 26, 2008 · national
KR 10-2008-0133007 · Dec 24, 2008 · national
KR 10-2009-0004243 · Jan 19, 2009 · national
KR 10-2009-0008590 · Feb 3, 2009 · national
KR 10-2009-0114783 · Nov 25, 2009 · national
Continuity (7)
Continuation 17895256 · Aug 25, 2022
Continuation 16835728 · Mar 31, 2020
Continuation 15980012 · May 15, 2018
Continuation 15200404 · Jul 1, 2016
Continuation 14588638 · Jan 2, 2015
Continuation 13131424
Related Publication 20240212698A1 · Jun 27, 2024
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