US5608713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bit allocation of digital audio signal blocks by non-linear processing
Assignee: Sony Corp
•
Filing: 1995-02-08
•
Granted: 1997-03-04
•
Expires: 2015-02-08
Abstract
Abstract A method and an apparatus for transmitting digital signals are disclosed. The input digital signal is converted into a plurality of blocks each having a finite time width and an finite frequency width. Signal components of at least some of the blocks are processed in a non-linear fashion, and the resulting non-linearly processed signal components are quantized. A recording medium on which encoded digital signals are recorded is also disclosed.
Inventors
- 👤 Kenzo Akagiri
- 👤 Yoshiaki Oikawa
- 👤 Hiroshi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; H04B1/665; G; G11; G11B; G11B20/00; G11B20/10; G11B20/00007
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
106 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said signal components are spectral components and said step of non-linearly processing includes enlarging the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 2
Dependent Claim
106 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said signal components are spectral components and said step of non-linearly processing includes enlarging the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 3
Dependent Claim
84 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said step of non-linearly processing includes enlarging the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 4
Dependent Claim
84 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said step of non-linearly processing includes enlarging the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 5
Dependent Claim
86 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said step of non-linearly processing includes reducing the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 6
Dependent Claim
86 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said step of non-linearly processing includes reducing the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 7
Dependent Claim
145 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said signal components are spectral components and the digital signal processing method includes normalizing said signal components, and wherein said step of non-linearly processing includes enlarging the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reducing the quantization value of said spectral component by said quantization to zero, and reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 8
Dependent Claim
145 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; and quantizing the non-linearly processed signal components, wherein said signal components are spectral components and the digital signal processing method includes normalizing said signal components, and wherein said step of non-linearly processing includes enlarging the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reducing the quantization value of said spectral component by said quantization to zero, and reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 9
Dependent Claim
34 words
The digital signal processing method as claimed in claim 4, wherein said first comparison level and the second comparison level are variable depending on the maximum value of the spectral component in each block.
Claim 10
Dependent Claim
38 words
The digital signal processing method as claimed in claim 5, wherein the larger the maximum spectral value in each block, at least one of said first comparison level and said second comparison level becomes lower and higher, respectively.
Claim 11
Dependent Claim
92 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width, a finite frequency width and signal components; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting a block having the word length as determined by bit allocation found on the basis of said signal component prior to said non-linear processing shorter than a pre-set word length as a block to be processed non-linearly.
Claim 12
Dependent Claim
92 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width, a finite frequency width and signal components; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting a block having the word length as determined by bit allocation found on the basis of said signal component prior to said non-linear processing shorter than a pre-set word length as a block to be processed non-linearly.
Claim 13
Dependent Claim
77 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width, wherein said signal components are spectral components; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 14
Dependent Claim
77 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width, wherein said signal components are spectral components; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 15
Dependent Claim
37 words
The digital signal processing method as claimed in claim 8, wherein, if the maximum spectral value of a block is not less than a pre-set value, the block is selected as a block to be processed non-linearly.
Claim 16
Dependent Claim
67 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting the block to be processed non-linearly on the basis of tonality in each block.
Claim 17
Dependent Claim
67 words
A digital signal processing method, comprising the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing the signal components of at least some of the blocks; quantizing the non-linearly processed signal components; and selecting the block to be processed non-linearly on the basis of tonality in each block.
Claim 18
Dependent Claim
63 words
The digital signal processing method as claimed in claim 10, wherein said signal components are spectral components, and wherein said tonality is found on the basis of a first component which at least is the spectral component among the spectral components in each block having the maximum signal-to-noise ratio and a second component having spectral components in each block excluding said first component.
Claim 19
Dependent Claim
34 words
The digital signal processing method as claimed in claim 11, wherein said tonality is a ratio of a first value derived from said first component and a second value derived from said second component.
Claim 20
Dependent Claim
34 words
The digital signal processing method as claimed in claim 12, wherein said first value is an effective value of said first component and said second value is an effective value of said second component.
Claim 21
Dependent Claim
108 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said step of non-linearly processing includes reducing the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 22
Dependent Claim
108 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said step of non-linearly processing includes reducing the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 23
Dependent Claim
88 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said non-linear processing means enlarges the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 24
Dependent Claim
88 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said non-linear processing means enlarges the spectral components except at least the spectral component which gives the maximum value in each block.
Claim 25
Dependent Claim
90 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said non-linear processing means reduces the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 26
Dependent Claim
90 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said non-linear processing means reduces the quantization value by said quantization of the signal component excluding at least the signal component having the maximum signal-to-noise ratio in each block to zero.
Claim 27
Dependent Claim
149 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said encoding means normalizes said signal components, and wherein said non-linear processing means enlarges the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reduces the quantization value of said spectral component by said quantization to zero, said non-linear processing means reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 28
Dependent Claim
149 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; and encoding means for quantizing the non-linearly processed signal components, wherein said signal components are spectral components and said encoding means normalizes said signal components, and wherein said non-linear processing means enlarges the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reduces the quantization value of said spectral component by said quantization to zero, said non-linear processing means reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 29
Dependent Claim
34 words
The digital signal processing apparatus as claimed in claim 17, wherein said first comparison level and the second comparison level are variable depending on the maximum value of the spectral component in each block.
Claim 30
Dependent Claim
38 words
The digital signal processing apparatus as claimed in claim 18, wherein the larger the maximum spectral value in each block, at least one of said first comparison level and said second comparison level becomes lower and higher, respectively.
Claim 31
Dependent Claim
99 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting a block having a word length as determined by bit allocation found on the basis of said signal component prior to said non-linearly processing a shorter than a pre-set word length as a block to be processed non-linearly.
Claim 32
Dependent Claim
99 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting a block having a word length as determined by bit allocation found on the basis of said signal component prior to said non-linearly processing a shorter than a pre-set word length as a block to be processed non-linearly.
Claim 33
Dependent Claim
78 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 34
Dependent Claim
78 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 35
Dependent Claim
37 words
The digital signal processing apparatus as claimed in claim 21, wherein, if the maximum spectral value of a block is not less than a pre-set value, the block is selected as a block to be processed non-linearly.
Claim 36
Dependent Claim
75 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a a plurality of blocks, each block having a finite time width and finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting the block to be processed non-linearly on the basis of tonality in each block.
Claim 37
Dependent Claim
75 words
A digital signal processing apparatus, comprising: means for converting a digital signal into signal components in a a plurality of blocks, each block having a finite time width and finite frequency width; non-linear processing means for non-linearly processing the signal components in at least some of said blocks; encoding means for quantizing the non-linearly processed signal components; and means for selecting the block to be processed non-linearly on the basis of tonality in each block.
Claim 38
Dependent Claim
64 words
The digital signal processing apparatus as claimed in claim 23, wherein said signal components are spectral components, and wherein said tonality is found on the basis of a first component which at least is the spectral component among the spectral components in each block having the maximum signal-to-noise ratio and a second component composed of spectral components in each block excluding said first component.
Claim 39
Dependent Claim
34 words
The digital signal processing apparatus as claimed in claim 24, wherein said tonality is a ratio of a first value derived from said first component and a second value derived from said second component.
Claim 40
Dependent Claim
34 words
The digital signal processing apparatus as claimed in claim 25, wherein said first value is an effective value of said first component and said second value is an effective value of said second component.
Claim 41
Dependent Claim
99 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width, wherein the signal components are spectral components; non-linearly processing signal components of at least some of the blocks; quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium; and selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 42
Dependent Claim
99 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width, wherein the signal components are spectral components; non-linearly processing signal components of at least some of the blocks; quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium; and selecting the block to be processed non-linearly on the basis of the maximum spectral value in each block.
Claim 43
Dependent Claim
35 words
The recording medium as claimed in claim 27, wherein, if the maximum spectral value of a block is not less than a pre-set value, the block is selected as a block to be processed non-linearly.
Claim 44
Dependent Claim
29 words
The recording medium as claimed in claim 28, prepared by a further step of: selecting the block to be processed non-linearly on the basis of tonality in each block.
Claim 45
Dependent Claim
62 words
The recording medium as claimed in claim 29, wherein said signal components are spectral components, and wherein said tonality is found on the basis of a first component which at least is the spectral component among the spectral components in each block having the maximum signal-to-noise ratio and a second component composed of spectral components in each block excluding said first component.
Claim 46
Dependent Claim
32 words
The recording medium as claimed in claim 30, wherein said tonality is a ratio of a first value derived from said first component and a second value derived from said second component.
Claim 47
Dependent Claim
32 words
The recording medium as claimed in claim 31, wherein said first value is an effective value of said first component and said second value is an effective value of said second component.
Claim 48
Dependent Claim
112 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium; and selecting a block having the word length as determined by bit allocation found on the basis of said signal component prior to said non-linear processing shorter than a preset word length as a block to be processed non-linearly.
Claim 49
Dependent Claim
112 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium; and selecting a block having the word length as determined by bit allocation found on the basis of said signal component prior to said non-linear processing shorter than a preset word length as a block to be processed non-linearly.
Claim 50
Dependent Claim
165 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said signal components are spectral components and the recording data is generated by normalizing said signal components, and wherein said non-linear processing includes enlarging the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reducing the quantization value of said spectral component by said quantization to zero, and reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 51
Dependent Claim
165 words
A recording medium having an encoded digital signal recorded thereon, said recording medium being prepared by the steps of: converting a digital signal into signal components in a plurality of blocks, each block having a finite time width and a finite frequency width; non-linearly processing signal components of at least some of the blocks; and quantizing the non-linearly processed signal components for generating recording data, and recording said recording data on the recording medium, wherein said signal components are spectral components and the recording data is generated by normalizing said signal components, and wherein said non-linear processing includes enlarging the spectral components having magnitudes intermediate between a first comparison level lower than the normalization level for said normalization and a second comparison level smaller than said first comparison level, or reducing the quantization value of said spectral component by said quantization to zero, and reducing the quantization value by said quantization of the spectral component smaller in magnitude than said second comparison level to zero.
Claim 52
Dependent Claim
32 words
The recording medium as claimed in claim 34, wherein said first comparison level and the second comparison level are variable depending on the maximum value of the spectral component in each block.
Claim 53
Dependent Claim
36 words
The recording medium as claimed in claim 35, wherein the larger the maximum spectral value in each block, at least one of said first comparison level and said second comparison level becomes lower and higher, respectively.
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