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Title:
DECODING APPARATUS, DECODING METHOD, ENCODING APPARATUS, ENCODING METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2011/125430
Kind Code:
A1
Abstract:
This invention relates to an encoding apparatus, an encoding method, a program, a decoding apparatus and a decoding method that can reduce the delay time caused by a band extension during a decoding process and that can suppress the increase of the resources on the decoding side. A higher frequency component generating unit (73) uses a lower frequency spectrum (SP-L) and a higher frequency envelope (ENV-H) to generate a pseudo higher frequency spectrum. A phase randomizing unit (74) randomizes, based on a random flag (RND), the phase of the pseudo higher frequency spectrum. An inverse MDCT unit (75) uses a lower frequency envelope (ENV-L) to denormalize the lower frequency spectrum (SP-L), and combines the pseudo higher frequency spectrum, which is supplied from the phase randomizing unit (74), with the lower frequency spectrum (SP-L) as denormalized. The combination result is used as the spectrum of the whole band. This invention is applicable to, for example, a decoding apparatus used for a band extension decoding.

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Inventors:
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)
MATSUMOTO Jun (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
JP2011/056108
Publication Date:
October 13, 2011
Filing Date:
March 15, 2011
Export Citation:
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Assignee:
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)
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)
International Classes:
G10L21/04; G10L19/02
Attorney, Agent or Firm:
INAMOTO Yoshio et al. (711 Building 4F, 11-18 Nishi-Shinjuku 7-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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Claims: