Encoding method and apparatus, decoding method and apparatus...

H - Electricity – 03 – M

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H03M 7/00 (2006.01) G11B 20/00 (2006.01) G11B 20/10 (2006.01) G11B 23/00 (2006.01) H04B 1/66 (2006.01) H04S 1/00 (2006.01) H04H 5/00 (2006.01)

Patent

CA 2233521

An encoding method and apparatus and a decoding 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.

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