符号化装置および方法、復号装置および方法、並びにプログラム

Japanese Patent JP7318645

B2

Provided is a decoding device including a demultiplexing section configured to demultiplex a coded bit stream, and extract transform window information indicating a type of a transform window used in time-frequency transform of an audio signal and coded data regarding frequency spectrum information obtained by the time-frequency transform from the coded bit stream. The decoding device further includes a decoding section configured to decode the coded data. Additionally, the decoding device includes a decoding scheme selection section configured to select a decoding scheme for the decoding section based on the transform window information. The decoding scheme selection section is configured to control the decoding section to decode the coded data by a decoding scheme corresponding to Huffman coding in a case in which the type of the transform window indicated by the transform window information is a transform window selected at a time of changing over the transform window length from a small transform window length to a large transform window length. Furthermore, the decoding scheme selection section is configured to control the decoding section to decode the coded data by a decoding scheme corresponding to arithmetic coding in a case in which the type of the transform window indicated by the transform window information is not the transform window selected at the time of changing over the transform window length from the small transform window length to the large transform window length.

Akifumi Kawano
Toru Chinen
Hiroyuki Homma
Yoshiaki Oikawa

JP2020525515A

August 01, 2023

June 07, 2019

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Sony Group Corporation

G10L19/02; G10L19/00; G10L19/022

JP2011022435A
JP2012181429A
JP2011509426A

Takashi Nishikawa
Yoshio Inamoto
Yusuke Miura

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