Voice spectrum analyzing system and method

Claim 2

A voice signal processing method, comprising: subjecting a voice signal to frequency analysis to produce a voice frequency spectral pattern having a predetermined frequency range; sampling said pattern successively at a predetermined time interval; arranging the sampled patterns in the order of occurrence in timed sequence, thereby forming an approximate periodic signal, said step of arranging including scanning each of said sampled patterns once in a predetermined manner and said scanning being carried out from a first end of said frequency range to a second end of said frequency range in one direction once for each of said sampled patterns; and extracting a high frequency component from said approximate periodic signal.

Claim 3

The method of claim 1 wherein a predetermined reference data is added for each scanning.

Claim 4

The method of claim 2 wherein said reference data is added after said second end.

Claim 5

The method of claim 1 wherein said scanning is carried out between first and second ends of said frequency range by reversing a scanning direction between the first and second ends for each of the successive sampled patterns.

Claim 6

The method of claim 4 wherein a predetermined reference data is added for each scanning.

Claim 7

The method of claim 5 wherein said reference data is added after said second end.

Claim 8

A voice signal processing system, comprising: analyzing means for subjecting a voice signal to frequency analysis to produce a frequency spectral pattern over a predetermined frequency range; sampling and storing means for sampling and storing said frequency spectral pattern successively at a predetermined time interval; scanning means for scanning said frequency spectral pattern stored in said sampling and storing means in a predetermined manner once while said frequency spectral pattern is stored in said sampling and storing means, thereby forming a substantially periodic signal from a series of said frequency spectral patterns, said scanning means scanning outputs of said sampling and storing means once in a predetermined direction during a time period which said frequency spectral data is stored in said sampling and storing means and said scanning direction being reversed each time when said scanning means scans the outputs of said plurality of sampling and storing means; and extracting means for extracting a high frequency component from said periodic signal, whereby said high frequency component constitutes a feature parameter of said voice signal.

Claim 9

A voice signal processing system, comprising: analyzing means for subjecting a voice signal to frequency analysis to produce a frequency spectral pattern over a predetermined frequency range; sampling and storing means for sampling and storing said frequency spectral pattern successively at a predetermined time interval; scanning means for scanning said frequency spectral pattern stored in said sampling and storing means in a predetermined manner once while said frequency spectral pattern is stored in said sampling and storing means, thereby forming a substantially periodic signal from a series of said frequency spectral patterns, said scanning means scanning outputs of said sampling and storing means once in a predetermined direction during a time period which said frequency spectral data is stored in said sampling and storing means and said scanning direction being reversed each time when said scanning means scans the outputs of said plurality of sampling and storing means; and extracting means for extracting a high frequency component from said periodic signal, whereby said high frequency component constitutes a feature parameter of said voice signal.

Claim 10

The system of claim 7 wherein said analyzing means includes a filter bank comprised of a plurality of band pass filters each having a different band pass frequency range and connected to said sampling and storing means.

Claim 11

The system of claim 8 wherein said sampling and storing means includes a plurality of sampling and storing circuits each connected to receive a frequency analyzed data from the corresponding one of said plurality of band pass filters.

Claim 12

The system of claim 7 further comprising an analog-to-digital converting means interposed between said scanning means and said extracting means.

Claim 13

The system of claim 10 wherein said extracting means includes a digital high pass filter.

Claim 14

A voice signal processing method, comprising the steps of: subjecting a voice signal to frequency analysis to produce a voice frequency spectral pattern having a predetermined time interval; sampling said pattern successively at a predetermined time interval; arranging the sampled patterns in the order of occurrence from a first end of a frequency range to a second end of said frequency range repetitively or between said first and second ends reciprocatingly in timed sequence, thereby forming an approximate periodic signal having a relatively low frequency component and a relatively high frequency component; and extracting said high frequency component from said approximate periodic signal.

Claim 15

A voice signal processing method, comprising the steps of: subjecting a voice signal to frequency analysis to produce a voice frequency spectral pattern having a predetermined time interval; sampling said pattern successively at a predetermined time interval; arranging the sampled patterns in the order of occurrence from a first end of a frequency range to a second end of said frequency range repetitively or between said first and second ends reciprocatingly in timed sequence, thereby forming an approximate periodic signal having a relatively low frequency component and a relatively high frequency component; and extracting said high frequency component from said approximate periodic signal.

Claim 16

A voice signal processing system, comprising: analyzing means for subjecting a voice signal to frequency analysis to produce a frequency spectral pattern over a predetermined frequency range; sampling and holding means for sampling and holding said frequency spectral pattern successively at a predetermined time interval; scanning means for scanning said frequency spectral pattern stored in said sampling and holding means in a predetermined manner once while said frequency spectral pattern is stored in said sampling and holding means, thereby forming a substantially periodic signal having a relatively high frequency component from a series of said frequency spectral patterns, said scanning means scanning outputs of said plurality of sampling and holding means once in a predetermined one direction during a time period while said frequency spectral data is stored in said sampling and holding means, the scanning direction being reversed each time from a first end of a frequency range to a second end of said frequency range repetitively or between said first and second ends reciprocatingly when said scanning means scans the outputs of said plurality of sampling and holding means; and extracting means for extracting said high frequency component from said periodic signal, whereby said high frequency component constitutes a feature parameter of said voice signal.

Claim 17

A voice signal processing system, comprising: analyzing means for subjecting a voice signal to frequency analysis to produce a frequency spectral pattern over a predetermined frequency range; sampling and holding means for sampling and holding said frequency spectral pattern successively at a predetermined time interval; scanning means for scanning said frequency spectral pattern stored in said sampling and holding means in a predetermined manner once while said frequency spectral pattern is stored in said sampling and holding means, thereby forming a substantially periodic signal having a relatively high frequency component from a series of said frequency spectral patterns, said scanning means scanning outputs of said plurality of sampling and holding means once in a predetermined one direction during a time period while said frequency spectral data is stored in said sampling and holding means, the scanning direction being reversed each time from a first end of a frequency range to a second end of said frequency range repetitively or between said first and second ends reciprocatingly when said scanning means scans the outputs of said plurality of sampling and holding means; and extracting means for extracting said high frequency component from said periodic signal, whereby said high frequency component constitutes a feature parameter of said voice signal.