Patent Number: 6,169,973

Title: Encoding method and apparatus, decoding method and apparatus and recording medium

Abstract: An encoding method and apparatus and a decodings method and apparatus in which the encoded information is decreased in volume and in which the encoding and decoding operations are performed with a smaller processing volume and a smaller buffer memory capacity. The apparatus includes a low range signal splitting circuit for separating low-range side signal components from L and R channel signals converted by a transform circuit into spectral signal components, and a channel synthesis circuit for synthesizing (L+R) channel signal components from the L and R channel spectral signal components. The apparatus also includes a high range signal separating circuit for separating the high range side signal components from the (L+R) channel signal components, a signal component encoding circuit for compression-encoding low-range side signal components and a signal component encoding circuit for compression-encoding the normalization coefficient information obtained on normalization of the (L+R) channel high-range signal components.

Inventors: Tsutsui; Kyoya (Kanagawa, JP), Shimoyoshi; Osamu (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: G11B 20/00 (20060101); G11B 20/10 (20060101); H04H 5/00 (20060101); H04B 1/66 (20060101); G10L 019/00 (); G10L 021/04 ()

Expiration Date: 01/02/2018