US20030195742A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encoding device and decoding device
Assignee: Panasonic Holdings Corp
•
Filing: 2003-04-09
•
Granted: —
•
Expires: 2023-04-09
Abstract
Abstract An encoding device ( 200 ) includes: a time characteristic extracting unit ( 203 ) that specifies a band for a part of a frequency spectrum based on a characteristic of an audio input signal in a time domain; a time transforming unit ( 204 ) that transforms a signal in the specified band to a signal according to frequency-time transform; and an encoded data stream generating unit ( 205 ) that encodes the signal obtained by the time transforming unit ( 204 ) and at least a part of the frequency spectrum, and generates an output encoded data stream from the encoded signal and the encoded frequency spectrum.
Inventors
- 👤 Mineo Tsushima
- 👤 Takeshi Norimatsu
- 👤 Naoya Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:16
CPC Classifications
G; G10; G10L; G10L19/00; G10L19/02; G10L19/0204; G10L19/0208; G10L19/0212
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
114 words
1 . An encoding device that encodes a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generates an output signal comprising: a first band specifying unit operable to specify a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming unit operable to transform a signal in the specified band to a signal according to frequency-time transformation; and an encoding unit operable to encode the signal obtained by the time transforming unit and at least a part of the frequency spectrum, and generate an output signal from the encoded signal and the encoded frequency spectrum.
Claim 2
Dependent Claim
114 words
1 . An encoding device that encodes a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generates an output signal comprising: a first band specifying unit operable to specify a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming unit operable to transform a signal in the specified band to a signal according to frequency-time transformation; and an encoding unit operable to encode the signal obtained by the time transforming unit and at least a part of the frequency spectrum, and generate an output signal from the encoded signal and the encoded frequency spectrum.
Claim 3
Dependent Claim
46 words
2 . The encoding device according to claim 1 , wherein the time transforming unit transforms the signal in the specified band to a signal indicating a temporal change of a frequency component on a time same as the frequency spectrum according to the frequency-time transformation.
Claim 4
Dependent Claim
87 words
3 . The encoding device according to claim 2 , wherein the encoding device further includes a time domain approximating unit operable to specify two or more bands of the frequency spectrum, and approximate, using a signal indicating a temporal change of a frequency component contained in one of the specified bands, a signal indicating a temporal change of a frequency component in other specified band, and the encoding unit encodes the signal used for the approximation for the band specified by the time domain approximating unit.
Claim 5
Dependent Claim
34 words
4 . The encoding device according to claim 3 , wherein the time domain approximating unit generates data that specifies the band used for the approximation and the band approximated in the frequency spectrum.
Claim 6
Dependent Claim
34 words
5 . The encoding device according to claim 4 , wherein the time domain approximating unit further generates data that indicates a gain of the signal used for the approximation for the signal approximated.
Claim 7
Dependent Claim
47 words
6 . The encoding device according to claim 5 , wherein the encoding unit encodes, in stead of the approximated signal, the data that specifies the band used for the approximation and the data that indicates the gain, which are generated by the time domain approximating unit.
Claim 8
Dependent Claim
35 words
7 . The encoding device according to claim 1 , wherein the first band specifying unit specifies a frequency band for a part having a big change in average energy of the input original signal.
Claim 9
Dependent Claim
61 words
8 . The encoding device according to claim 1 , wherein the encoding device further includes a second band specifying unit operable to specify a band for a part of the frequency spectrum based on a characteristic of the frequency spectrum, and the time transforming unit transforms a signal of the specified band to a signal according to the frequency-time transformation.
Claim 10
Dependent Claim
73 words
9 . The encoding device according to claim 8 , wherein the encoding device further includes a frequency domain approximating unit operable to specify two or more bands contained in the frequency spectrum, and approximates, using a frequency spectrum of one of the specified bands, a frequency spectrum of other band, and the encoding unit encodes the frequency spectrum used for the approximation for the band specified by the frequency domain approximating unit.
Claim 11
Dependent Claim
34 words
10 . The encoding device according to claim 9 , wherein the frequency domain approximating unit generates data that specifies the band used for the approximation and the band approximated in the frequency spectrum.
Claim 12
Dependent Claim
36 words
11 . The encoding device according to claim 10 , wherein the frequency domain approximating unit further generates data that indicates a gain of the frequency spectrum used for the approximation for the frequency spectrum approximated.
Claim 13
Dependent Claim
48 words
12 . The encoding device according to claim 11 , wherein the encoding unit encodes, in stead of the approximated frequency spectrum, the data that specifies the band used for the approximation and the data that indicates the gain, which are generated by the frequency domain approximating unit.
Claim 14
Dependent Claim
30 words
13 . The encoding device according to claim 8 , wherein the second band specifying unit specifies a band having wide spread of frequency spectral coefficients in the frequency spectrum.
Claim 15
Dependent Claim
117 words
14 . A decoding device that decodes an encoded data stream obtained by encoding an input original signal, and outputs a frequency spectrum, comprising: a decoding unit operable to extract a part of the encoded data stream contained in the input encoded data stream, and decode the extracted encoded data stream; a frequency transforming unit operable to transform a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing unit operable to compose a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming unit, on a frequency axis.
Claim 16
Dependent Claim
117 words
14 . A decoding device that decodes an encoded data stream obtained by encoding an input original signal, and outputs a frequency spectrum, comprising: a decoding unit operable to extract a part of the encoded data stream contained in the input encoded data stream, and decode the extracted encoded data stream; a frequency transforming unit operable to transform a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing unit operable to compose a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming unit, on a frequency axis.
Claim 17
Dependent Claim
58 words
15 . The decoding device according to claim 14 , wherein the frequency spectrum obtained by the frequency transforming unit and the frequency spectrum obtained by decoding the encoded data stream extracted from other part of the encoded data stream are a frequency spectrum that indicates a signal on a same time for the same input original signal.
Claim 18
Dependent Claim
58 words
16 . The decoding device according to claim 15 , wherein the decoding device further includes a time approximating unit operable to approximate a band, which indicated by the extracted encoded data stream, by a signal decoded from an encoded data stream in other band, and the frequency transforming unit transforms the approximated signal to a frequency spectrum.
Claim 19
Dependent Claim
57 words
17 . The decoding device according to claim 16 , wherein the time approximating unit specifies a band of the signal, which is used for the approximation of the band indicated by the encoded data stream, according to data contained in the extracted encoded data stream, and executes the approximation using the signal of the specified band.
Claim 20
Dependent Claim
59 words
18 . The decoding device according to claim 17 , wherein the time approximating unit further approximates the band by reading a gain of the signal used for the approximation for the signal approximated from data contained in the extracted encoded data stream, and by adjusting an amplitude of the signal in the specified band using the read gain.
Claim 21
Dependent Claim
57 words
19 . The encoding device according to claim 17 , wherein the time approximating unit specifies a band already transformed to a frequency spectrum, transforms the frequency spectrum of the specified band to a signal according to frequency-time transformation, and approximates a band indicated by the extracted encoded data stream using the signal obtained by the transformation.
Claim 22
Dependent Claim
99 words
20 . The encoding device according to claim 16 , wherein the decoding device further includes a frequency approximating unit operable to approximate the band, which is indicated by the extracted encoded data stream, by a frequency spectrum decoded from an encoded data stream in other band, and the composing unit further composes the frequency spectrum approximated by the frequency approximating unit on the frequency axis, in addition to the frequency spectrum obtained by decoding the encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum obtained by the frequency transforming unit.
Claim 23
Dependent Claim
57 words
21 . The decoding device according to claim 20 , wherein the frequency approximating unit specifies a band of the frequency spectrum used for the approximation of the band indicated by the encoded data stream, according to data contained in the extracted encoded data stream, and executes the approximation using the frequency spectrum of the specified band.
Claim 24
Dependent Claim
63 words
22 . The decoding device according to claim 21 , wherein the frequency approximating unit further approximates the band by reading a gain of the frequency spectrum used for the approximation for the approximated frequency spectrum from the data contained in the extracted encoded data stream, and by adjusting an amplitude of the frequency spectrum in the specified band using the read gain.
Claim 25
Dependent Claim
111 words
23 . An encoding method for encoding a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generating an output signal, including: a first band specifying step for specifying a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming step for transforming a signal of the specified band to a signal according to frequency-time transformation; and an encoding step for encoding the signal obtained by the time transforming step and at least a part of the frequency spectrum, and generating an output signal from the encoded signal and the encoded frequency spectrum.
Claim 26
Dependent Claim
111 words
23 . An encoding method for encoding a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generating an output signal, including: a first band specifying step for specifying a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming step for transforming a signal of the specified band to a signal according to frequency-time transformation; and an encoding step for encoding the signal obtained by the time transforming step and at least a part of the frequency spectrum, and generating an output signal from the encoded signal and the encoded frequency spectrum.
Claim 27
Dependent Claim
114 words
24 . A decoding method for decoding an encoded data stream obtained by encoding an input original signal, and outputting a frequency spectrum, including: a decoding step for extracting a part of the encoded data stream contained in the input encoded data stream, and decoding the extracted encoded data stream; a frequency transforming step for transforming a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing step for composing a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming step, on a frequency axis.
Claim 28
Dependent Claim
114 words
24 . A decoding method for decoding an encoded data stream obtained by encoding an input original signal, and outputting a frequency spectrum, including: a decoding step for extracting a part of the encoded data stream contained in the input encoded data stream, and decoding the extracted encoded data stream; a frequency transforming step for transforming a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing step for composing a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming step, on a frequency axis.
Claim 29
Dependent Claim
115 words
25 . A program for encoding a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generating an output signal, the program having the computer execute: a first band specifying step for specifying a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming step for transforming a signal of the specified band to a signal according to frequency-time transformation; and an encoding step for encoding the signal obtained by the time transforming step and at least a part of the frequency spectrum, and generating an output signal from the encoded signal and the encoded frequency spectrum.
Claim 30
Dependent Claim
115 words
25 . A program for encoding a signal in a frequency domain obtained by transforming an input original signal according to time-frequency transformation, and generating an output signal, the program having the computer execute: a first band specifying step for specifying a band for a part of a frequency spectrum based on a characteristic of the input original signal; a time transforming step for transforming a signal of the specified band to a signal according to frequency-time transformation; and an encoding step for encoding the signal obtained by the time transforming step and at least a part of the frequency spectrum, and generating an output signal from the encoded signal and the encoded frequency spectrum.
Claim 31
Dependent Claim
118 words
26 . A program for decoding an encoded data stream obtained by encoding an input original signal, and outputting a frequency spectrum, the program having the computer execute: a decoding step for extracting a part of the encoded data stream contained in the input encoded data stream, and decoding the extracted encoded data stream; a frequency transforming step for transforming a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing step for composing a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming step, on a frequency axis.
Claim 32
Dependent Claim
118 words
26 . A program for decoding an encoded data stream obtained by encoding an input original signal, and outputting a frequency spectrum, the program having the computer execute: a decoding step for extracting a part of the encoded data stream contained in the input encoded data stream, and decoding the extracted encoded data stream; a frequency transforming step for transforming a signal obtained by decoding the extracted encoded data stream to a frequency spectrum; and a composing step for composing a frequency spectrum, which is obtained by decoding an encoded data stream extracted from other part of the input encoded data stream, and the frequency spectrum, which is obtained by the frequency transforming step, on a frequency axis.
References Cited (Backward Citations)
US5109417A
Cited
US5394473A
Cited
US5765126A
Cited
US5684920A
Cited
US5654952A
Cited
US6366545B2
Cited
US6522747B1
Cited
US6895375B2
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.