US 12,148,438 B2
Encoding apparatus and decoding apparatus for transforming between modified discrete cosine transform-based coder and different coder
Seung Kwon Beack, Daejeon (KR); Tae Jin Lee, Daejeon (KR); Min Je Kim, Daejeon (KR); Dae Young Jang, Daejeon (KR); Kyeongok Kang, Daejeon (KR); Jin Woo Hong, Daejeon (KR); Ho Chong Park, Seongnam-si (KR); and Young-cheol Park, Wonju-si (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR); and KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION, Seoul (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR); and KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION, Seoul (KR)
Filed on Jul. 12, 2021, as Appl. No. 17/373,243.
Application 17/373,243 is a continuation of application No. 15/714,273, filed on Sep. 25, 2017, granted, now 11,062,718.
Application 15/714,273 is a continuation of application No. 13/057,832, granted, now 9,773,505, issued on Sep. 26, 2017, previously published as PCT/KR2009/005340, filed on Sep. 18, 2009.
Claims priority of application No. 10-2008-0091697 (KR), filed on Sep. 18, 2008.
Prior Publication US 2022/0005486 A1, Jan. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/022 (2013.01); G10L 19/02 (2013.01); G10L 19/18 (2013.01)
CPC G10L 19/0212 (2013.01) 5 Claims
OG exemplary drawing
 
1. A coding method performed by a device, comprising:
identifying a previous frame which has a speech characteristic to be coded in a time domain;
identifying a current frame which has an audio characteristic to be coded in a frequency domain;
processing for modifying a specific area of the previous frame to be overlap-added with the current frame; and
performing an overlap-add on a first signal for the specific area of the previous frame and a second signal for the current frame,
wherein the specific area is modified based on a length of additional MDCT information,
wherein the previous frame is divided into a first area and a second area, wherein the second area is located after the first area in the previous frame, wherein the specific area corresponds to the second area,
wherein the current frame is coded according to the MDCT by applying a first window into the additional MDCT information, applying a second window into the current frame, and performing the overlap-add between the additional MDCT information applied to the first window and the current frame applied to second window, in a decoding processing, and
wherein the additional MDCT information is extracted from a delayed block in the previous frame with respect to a block of the current frame.