【発明の名称】積の数を減らすことによりディジタルフィルタバンクの電力消費を減らす方法

Japanese Patent JP3223188

B2

PCT No. PCT/SE91/00860 Sec. 371 Date Mar. 17, 1994 Sec. 102(e) Date Mar. 17, 1994 PCT Filed Dec. 13, 1991 PCT Pub. No. WO92/11696 PCT Pub. Date Jul. 9, 1992.A digital filter bank analyzer for reducing power consumption by decreasing the number of multiplications carried out therein. There is particularly provided a filter bank analyzer for use in battery-operated applications. The digital filter bank analyzer includes a zero-filled expanded digital basic filter [H1(z)] having a complementary output, and downstream, parallel part-filter banks [HD1,HD2]. In the present context, a zero-filled filter pertains to a filter which may be used on an LP-filter that which is expanded with a number of zero-filter coefficients between each coefficient in the original filter. The part-filter bank [HD1] connected to the normal output of the basic filter [H1(z)] is intended to filter-out those filter-bank bands which are pass bands to the basic filter, so that only one of the filter-bank bands is found on each output signal from said one part-filter bank [HD1]. The other part-filter bank [HD2] connected to the complementary output of the basic filter [H1(z)] is intended to filter-out those filter-bank bands which are pass bands to the complementary output of the basic filter, so that only one filter-bank band is found on each output signal from the second part-filter bank [HD2].

Lunner, Thomas

JP50148692A

October 29, 2001

December 13, 1991

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Lunner, Thomas
Hellen, Johann

H03H17/00; H03H17/02; H03H17/06; (IPC1-7): H03H17/06; H03H17/00

JP2117204A
JP647810A
JP6198035A
JP60197009A
JP2121513A
JP6424621A
JP63502944A
JP1503346A

１９９１ ＩＥＥＥ ＩＮＴＥＲＮＡＴＩＯＮＡＬ ＣＯＮＦＥＲＥＮＣＥ ＯＮ ＡＣＯＵＳＴＩＣＳ，ＳＰＥＥＣＨ，ＡＮＤ ＳＩＧＮＡＬ ＰＲＯＣＥＳＳＩＮＧ，１９９１．ＩＣＡＳＳＰ−９１．，１９９１，［Ｖｏｌ．５］（１９９１−４）ｐ．３６６１−３６６４

Akira Asamura (3 outside)

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