ENCODING DEVICE AND ENCODING METHOD, DECODING DEVICE AND DECODING METHOD, AND PROGRAM

WIPO Patent Application WO/2011/114933

A1

Disclosed are an encoding device and an encoding method, a decoding device and a decoding method, and a program that reduce sound quality deterioration caused by encoding audio signals. An envelope enhancing unit (51) enhances an envelope (ENV). A noise-shaping unit (52) divides an enhanced envelope (D) that is an enhanced envelope (ENV), with a value larger than 1 and subtracts noise-shaping (G) identified by data (NS), from the division result. A quantizing unit (14) quantizes normalized spectral (S1) which is a spectral (S0) normalized based on a quantized bit count (WL), using the subtraction result as quantized bit count (WL). A multiplexer (53) multiplexes data (NS), quantized spectral (QS) that is the quantized normalized spectral (S1), and envelope (ENV). This can be applied, for example, to an encoding device that encodes audio signals.

SUZUKI Shiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
鈴木　志朗 (〒75 東京都港区港南１丁目７番１号　ソニー株式会社内 Tokyo, 〒1080075, JP)
MATSUMURA Yuuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
松村　祐樹 (〒75 東京都港区港南１丁目７番１号　ソニー株式会社内 Tokyo, 〒1080075, JP)

JP2011/055294

September 22, 2011

March 08, 2011

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SONY CORPORATION (1-7-1, Konan Minato-k, Tokyo 75, 〒1080075, JP)
ソニー株式会社 (〒75 東京都港区港南１丁目７番１号 Tokyo, 〒1080075, JP)
SUZUKI Shiro (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
鈴木　志朗 (〒75 東京都港区港南１丁目７番１号　ソニー株式会社内 Tokyo, 〒1080075, JP)
MATSUMURA Yuuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)

G10L19/02; G10L19/14; H03M7/30

INAMOTO Yoshio et al. (711 Building 4F, 11-18 Nishi-Shinjuku 7-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)

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